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“Idir” in Irish (between, among): Meaning and Prepositional Pronouns

Idir means between, among. Joined to a pronoun it becomes one word: eadrainn (idir + us). These one-word forms are called prepositional pronouns, forainmneacha réamhfhoclacha.
Updated October 2026Report a mistake

What does “idir” mean?

1between
Used to show that something is in the space or time separating two things or people.Also: in between, in the middle of.
2among
Used when something is shared or spread out in a group of people or things.Also: amongst, shared between.
3both ... and
In the pattern 'idir ... agus ...' it means both one thing and the other, and the nouns are lenited.Also: both and, both, including.

Pronounced “ij-er” /ˈɪdʲəɾʲ/.

“Idir” with pronouns

In Irish you never say “idir mé”. The preposition and the pronoun fuse into one word. Learn these 3 forms and you can use idir with anyone. Click a form for its own page.

PronounIrishMeaningExample
sinn (us)eadrainnbetween usRoinnfimid an cáca eadrainn.We'll share the cake between us.
sibh (you (plural))eadraibhbetween you (plural)Roinnigí an t-airgead eadraibh.Share the money among yourselves.
siad (them)eatarthubetween themNíl mórán difríochta eatarthu.There isn't much difference between them.

“Idir” before a noun

Idir lenites the next word (séimhiú): the first letter takes an h, idir chathaoir.

idir chathaoir
between, among a chair
Lenition (séimhiú) of the next word
idir an chathaoir
between, among the chair
With the article the noun stays as it is after an (idir an t-am, idir an chathaoir)
idir na cathaoireacha
between, among the chairs
Plural: idir na, no change

Only has plural pronoun forms. Lenites in idir … agus (idir fhir agus mhná, both men and women); no lenition when it means between two things.

Bhí idir óg agus aosta ann.
There were both young and old there.
Tá an mála idir an chathaoir agus an doras.
The bag is between the chair and the door.
Tá an bord idir na cathaoireacha.
The table is between the chairs.

Everyday phrases with “idir”

idir an dá linn
in the meantime
eadrainn féin
between ourselves
idir dhá chomhairle
in two minds, undecided
idir fhir agus mhná
both men and women

The other prepositions

Every simple preposition has its own set of pronoun forms.

“Idir” in Irish: frequently asked questions

What does idir mean in Irish?

idir means between, among. With a pronoun it becomes one word: eadrainn (between, among us), eadraibh (between, among you (plural)), eatarthu (between, among them).

What is the Irish for between me?

eadrainn. The preposition idir and the pronoun mé fuse into one word; this is a prepositional pronoun (forainm réamhfhoclach).

Does idir change the next word?

Idir lenites the next word (séimhiú): the first letter takes an h, idir chathaoir. Only has plural pronoun forms. Lenites in idir … agus (idir fhir agus mhná, both men and women); no lenition when it means between two things.

How do I say 'between you and me' in Irish?

You can say 'eadrainn féin', which means 'between ourselves'. It is used when sharing a secret.

Why is the word after 'idir' sometimes lenited and sometimes not?

When 'idir ... agus ...' means 'both ... and', the nouns are lenited, as in 'idir fhir agus mhná' (both men and women). When it simply means 'between' two things, there is no lenition, as in 'idir Gaillimh agus Corcaigh'.

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