The French prefix é- sometimes comes from Latin ex-, meaning “out of”, “away from” or “from”. In these words, é- can express separation, removal, extraction or movement away from something. It can also have related meanings such as completion or intensification.

However, not every French word beginning with é- contains this prefix. Some words simply happen to begin with the letter é. Even when é- is a prefix, its meaning is not always the same as English “ex”.

This is important because there is no general rule that allows you to see é- at the beginning of a French word and translate it as “ex”. The history and meaning of the individual word have to be considered.

The French prefix é- is related to the Latin prefixes e- and ex-, both of which expressed the idea of “out of”. In French, the form has changed according to the sounds that followed it.

É- meaning “out of”, “away from” or “from”

This is the clearest case in which é- corresponds to the basic idea of Latin ex-.

The prefix can express the idea of taking something out, removing something, separating things or moving something away.

For example:

• Ébrancher un arbre – “To remove the branches from a tree”
• Écaler un œuf – “To remove the shell from an egg”
• Écorcher un animal – “To skin an animal”
• Écrém­er du lait – “To remove the cream from milk”
• Écumer une soupe – “To remove the scum from a soup”
• Éfeuiller une plante – “To remove the leaves from a plant”
• Épépiner un fruit – “To remove the seeds from a fruit”

Here the meaning of é- is close to “remove from” or “take out of”.

The corresponding verbs can often be paraphrased with enlever or retirer:

• Enlever les branches d’un arbre – “To remove the branches from a tree”
• Retirer les graines d’un fruit – “To remove the seeds from a fruit”

The prefix is particularly easy to recognise in words where the base word is still recognisable:

• ébarber comes from barbe – “to remove the beard or rough edge”
• ébrancher comes from branche – “to remove branches”
• écailler comes from écaille – “to remove scales”
• écorner comes from corne – “to remove a horn or horns”
• écrém­er comes from crème – “to remove the cream”
• épépiner comes from pépin – “to remove the seeds”

The exact history of individual words can be complicated, so this should be treated as a useful pattern rather than a rule for forming new words.

É- in échanger

Échanger is a particularly interesting example because its meaning is not simply “take out”.

Échanger comes from changer, with the prefix é-. Its original sense developed around the idea of changing one thing for another.

The modern verb means “to exchange”, “to swap” or, in some contexts, “to exchange with one another”.

• Nous avons échangé nos places. – “We swapped our seats.”
• Ils ont échangé leurs numéros de téléphone. – “They exchanged their telephone numbers.”
• Nous avons échangé quelques mots. – “We exchanged a few words.”
• Ils ont échangé des cadeaux. – “They exchanged gifts.”

It is therefore misleading to think of é- in échanger as meaning simply “ex-“.

A useful way to understand it is that the prefix is historically related to the Latin idea of movement or change “out of” one state or position, but the modern meaning of échanger must be learnt as a whole.

The same applies to many other common French words. Knowing the history of the prefix can help you understand a word, but it does not always give you its modern meaning directly.

É- meaning separation

The prefix can also express separation or moving something apart.

Écarter is a good example.

• Écarter les bras. – “To spread your arms apart.”
• Écarter les jambes. – “To spread your legs apart.”
• Écarter un danger. – “To avert a danger.”
• Écarter une possibilité. – “To rule out a possibility.”
• Écarter quelqu’un du groupe. – “To exclude someone from the group.”

The basic idea is one of moving something away or separating it from something else.

The related reflexive verb s’écarter means “to move away”, “to step aside” or “to depart from” something.

• Écartez-vous, s’il vous plaît. – “Please move aside.”
• Il s’est écarté du groupe. – “He moved away from the group.”
• Il ne faut pas s’écarter du sujet. – “We must not depart from the subject.”

In this group of words, the connection with “away from” is fairly easy to see.

É- meaning removal

Another common use is to remove something from an object.

• Écorcer un arbre – “To remove the bark from a tree.”
• Écosser des petits pois – “To shell peas.”
• Écoudre une pièce – “To remove a piece that has been sewn on.”
• Évider un fruit – “To hollow out a fruit.”
• Éviscérer un animal – “To remove the internal organs from an animal.”

Some of these verbs are uncommon in everyday conversation, but the pattern is useful because the prefix often indicates that something is being removed.

Compare:

• Écorcer un arbre – “To strip the bark from a tree.”
• Enlever l’écorce d’un arbre – “To remove the bark from a tree.”

The second expression uses the ordinary verb enlever rather than the prefixed verb.

É- meaning “out”

Some words express the idea of something coming out or moving out.

Échapper is related to this idea.

• Le ballon s’est échappé. – “The balloon got away.”
• Le prisonnier s’est échappé. – “The prisoner escaped.”
• Cela m’a échappé. – “That escaped me.”
• Le mot m’a échappé. – “The word slipped out.”

The modern meaning of échapper is not simply predictable from é- plus chapper, because chapper is not an ordinary modern French verb. The word has to be learnt as a whole.

Other examples include:

• Émigrer – “To emigrate.”
• Émaner – “To emanate.”
• Émerger – “To emerge.”
• Évacuer – “To evacuate.”
• Éjecter – “To eject.”

The Latin connection with ex- is particularly strong in some of these words, but their modern French meanings cannot always be reduced to a simple translation of the prefix.

É- meaning completion or intensification

There is another historical use of é- that does not mean “out of” in a simple physical sense.

The prefix can express the idea of completing an action, bringing something into a certain state, or intensifying an action. CNRTL distinguishes this use from the é- that expresses removal or separation.

For example:

• Élargir – “To widen.”
• Épaissir – “To thicken.”
• Éclaircir – “To lighten; to clear up.”
• Élever – “To raise; to bring up.”
• Éveiller – “To awaken.”

These words should not be understood as containing an é- meaning “ex”.

The historical prefix may be related to Latin ex-, but its function changed in the development of French.

This is one reason why trying to translate every French prefix literally can lead you astray.

É- and words meaning “make something become…”

Some prefixed verbs have the sense of causing something to acquire a particular quality or form.

For example:

• Élargir – “To make wider; to widen.”
• Épaissir – “To make thicker; to thicken.”
• Éclaircir – “To make lighter; to clarify.”
• Émousser – “To blunt.”
• Évaser – “To widen towards the top.”

In such words, looking for “ex” is not useful.

For example, élargir does not mean “ex-widen”. It means “to widen”.

When é- does not mean anything by itself

There is an even more important point.

A French word beginning with é- does not necessarily contain the prefix é- at all.

Sometimes é is simply the first letter of the word.

For example:

• École – “School”
• Église – “Church”
• Été – “Summer”
• Étoile – “Star”
• Étage – “Floor; storey”
• Épaule – “Shoulder”
• Épice – “Spice”
• Éponge – “Sponge”
• Étable – “Stable”
• Étranger – “Foreigner; foreign”

You cannot take the é- off these words and expect to find a meaningful base word.

For example, école is not é- + cole in modern French.

Likewise:

• été does not mean “ex” + some form of té.
• église does not mean “ex” + glise.
• étoile does not mean “ex” + toile.

In these cases, the initial é is simply part of the word.

É- is not the same as French ex-

French also has the prefix ex-, which is much closer to English “ex-” in some of its uses.

Most importantly, ex- can mean that someone formerly had a particular position, relationship or status.

• Un ex-président – “A former president.”
• Une ex-ministre – “A former minister.”
• Un ex-mari – “An ex-husband.”
• Une ex-femme – “An ex-wife.”
• Un ex-directeur – “A former director.”

This is completely different from the é- in échanger, écarter or ébrancher.

The prefix ex- meaning “former” comes from another use of Latin ex-. It developed the sense of “formerly” or “previously”.

So:

• Un ex-président – “A former president.”
• Écarter un président – “To remove or set aside a president.”

The two prefixes may have the same distant Latin source, but they perform different functions in modern French.

Ex- meaning “former”

English speakers should be particularly careful with this use because French ex- works much like English ex-.

• Mon ex-mari habite à Sydney. – “My ex-husband lives in Sydney.”
• Elle a rencontré son ex-patron. – “She met her former boss.”
• Il est devenu ex-président en 2025. – “He became a former president in 2025.”
• Son ex-femme vit à Melbourne. – “His ex-wife lives in Melbourne.”

In formal French, ancien or another more precise adjective can sometimes be preferable to ex-.

• Son ancien directeur – “His former director.”
• Son ancien professeur – “His former teacher.”
• L’ancien président – “The former president.”

The Académie française has noted that ex- is sometimes used too freely and that ancien, précédent or another more precise expression can be preferable depending on the context.

É- does not mean English “ex-” in words such as exister

There are also French words beginning with ex- that have nothing to do with the English idea of “former”.

For example:

• Exister – “To exist.”
• Expliquer – “To explain.”
• Explorer – “To explore.”
• Exprimer – “To express.”
• Extraire – “To extract.”

Here ex- has different historical functions.

The same applies to words such as exalter, exécrable, exhorter and exhumer. The pronunciation and history of ex- vary according to the word.

Why does Latin ex- become French é-?

Latin had the preposition ex, meaning “out of” or “from”, and the related prefix ex-.

As Latin developed into French, many Latin prefixes changed their form.

In French, ex- could develop into é-, particularly when it became fully integrated into a word. There are also forms such as ef- and es- in French, depending on the sound that followed.

This explains forms such as:

• Écrire – “To write.”
• Effacer – “To erase.”
• Essuyer – “To wipe.”

But this does not mean that every initial é, ef or es in French should be analysed as the modern equivalent of English “ex”.

The history of a word matters.

É- and dé-

French learners sometimes confuse é- with dé- because both prefixes can occur in verbs describing removal or separation.

For example:

• Ébrancher un arbre – “To remove the branches from a tree.”
• Débrancher un appareil – “To unplug a device.”

The prefixes have different histories and are not interchangeable.

Similarly:

• Écarter quelqu’un – “To move or keep someone aside.”
• Décourager quelqu’un – “To discourage someone.”

Dé- has several meanings of its own, including separation, reversal and removal. It is therefore not simply the French equivalent of é-.

Useful examples to learn as complete words

It is useful to group common words according to their meaning rather than trying to translate é- mechanically.

Removal

• Ébarber – “To remove rough edges.”
• Ébrancher – “To remove branches.”
• Écailler – “To remove scales.”
• Écorcer – “To remove bark.”
• Écorcher – “To skin.”
• Écosser – “To shell.”
• Écorner – “To remove a horn or horns; to dog-ear.”
• Écrémer – “To skim; to remove the cream.”
• Écumer – “To skim; to remove scum.”
• Éfeuiller – “To remove leaves.”
• Épépiner – “To remove seeds.”

Separation or movement away

• Écarter – “To move aside; to separate; to rule out.”
• S’écarter – “To move away; to depart.”
• Échapper – “To escape; to get away.”
• Éloigner – “To move away; to distance.”

Exchange or change

• Échanger – “To exchange; to swap.”
• Échanger des idées – “To exchange ideas.”
• Échanger des informations – “To exchange information.”
• Échanger quelques mots – “To exchange a few words.”

Other meanings

• Élargir – “To widen.”
• Élever – “To raise; to bring up.”
• Émerger – “To emerge.”
• Émigrer – “To emigrate.”
• Épaissir – “To thicken.”
• Éveiller – “To awaken.”

The last group shows why é- cannot simply be translated as “ex”.

Synonyms and alternative expressions

Many verbs beginning with é- have an ordinary French alternative without the prefix.

For example:

• Écarter un danger – “To avert a danger.”
• Éloigner un danger – “To keep a danger away.”
• Éviter un danger – “To avoid a danger.”
• Épépiner un fruit – “To remove the seeds from a fruit.”
• Enlever les pépins d’un fruit – “To remove the seeds from a fruit.”
• Écorcer un arbre – “To remove the bark from a tree.”
• Enlever l’écorce d’un arbre – “To remove the bark from a tree.”
• Échanger une voiture contre une autre – “To exchange one car for another.”
• Troquer une voiture contre une autre – “To swap one car for another.”
• Échanger des idées – “To exchange ideas.”
• Discuter de ses idées – “To discuss one’s ideas.”

The prefixed verb is often shorter and more idiomatic, but the longer expression can make the meaning easier to understand.

How to recognise the “ex” meaning

A useful test is to ask what the verb describes.

If it describes removing something, taking something out, separating something or moving something away, the é- may well have the historical value of Latin ex-.

For example:

• Ébrancher – removing branches
• Écorcer – removing bark
• Écrémer – removing cream
• Épépiner – removing seeds
• Écarter – moving something aside

If the word describes exchange, change, completion, intensification or another action, the prefix may have developed a different function.

For example:

• Échanger – to exchange
• Élargir – to widen
• Épaissir – to thicken
• Éveiller – to awaken

And if there is no recognisable base word, it may not be useful to analyse the initial é- at all.

For example:

• École – “School”
• Église – “Church”
• Été – “Summer”
• Étoile – “Star”

The safest approach is therefore to treat é- as a clue, not as a translation.

Summary

French é- has several historical uses.

• It can come from Latin ex- meaning “out of”, “from” or “away from”.
• It can express removal, extraction or separation, as in ébrancher, écorcer and épépiner.
• It can express movement away, as in écarter and échapper.
• It occurs in words such as échanger, where the modern meaning is “to exchange” and cannot be translated by simply treating é- as “ex”.
• It can have other historical functions, including completion or intensification.
• Some words beginning with é- do not contain this prefix at all.
• French ex- is also used to mean “former”, as in un ex-président and une ex-femme.
• The initial é- is therefore a useful clue to the history of some French words, but it is not a general French equivalent of English “ex”.