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“Fúinn” in Irish (under us, about us): Meaning and Where It Comes From

Fúinn means under us, about us. It is the preposition faoi (under) and the pronoun sinn (us) joined into one word. Irish does this with every simple preposition; the joined words are called prepositional pronouns, forainmneacha réamhfhoclacha.
Updated October 2026Report a mistake

Where “fúinn” comes from

Take the preposition, add the pronoun, and they fuse into one word. You never say “faoi sinn” in Irish.

faoiunder +
sinnus
=
fúinnunder us, about us

Under, and also about: tá an cat fúm = the cat is under me, labhair sé fúm = he spoke about me, bhíomar ag caint fút = we were talking about you.

“Fúinn” in the table of “faoi”

Every form of faoi with a pronoun. Fúinn is the fifth (we, us) row. Click any form to see its own page.

PronounIrishMeaningExample
mé (me)fúmunder me, about meBhí siad ag gáire fúm.They were laughing at me.
tú (you)fútunder you, about youTá sé fút féin.It's up to you.
sé (him / it)faoiunder him / it, about him / itChuala mé scéal faoi inné.I heard a story about him yesterday.
sí (her / it)fúithiunder her / it, about her / itBhí siad ag caint fúithi.They were talking about her.
sinn (us)fúinnunder us, about usNá bí ag magadh fúinn.Don't be making fun of us.
sibh (you (plural))fúibhunder you (plural), about you (plural)Inis dom fúibh féin.Tell me about yourselves.
siad (them)fúthuunder them, about themNíl mórán ar eolas agam fúthu.I don't know much about them.

“Fúinn” in sentences

Ná bí ag magadh fúinn.
Don't be making fun of us.

“sinn” with the other prepositions

The same pronoun, sinn (us), joined to the other prepositions.

“Fúinn” in Irish: frequently asked questions

What does fúinn mean in Irish?

fúinn means under us, about us: the preposition faoi (under) joined to the pronoun sinn (us). The next form is fúibh, under you (plural), about you (plural).

Is fúinn one word or two?

One word. A simple preposition and a pronoun always fuse in Irish, so you never say “faoi sinn”. These fused words are prepositional pronouns, forainmneacha réamhfhoclacha.

What are all the forms of faoi with pronouns?

fúm (under me, about me), fút (under you, about you), faoi (under him / it, about him / it), fúithi (under her / it, about her / it), fúinn (under us, about us), fúibh (under you (plural), about you (plural)), fúthu (under them, about them).

When do I use fúinn?

Under, and also about: tá an cat fúm = the cat is under me, labhair sé fúm = he spoke about me, bhíomar ag caint fút = we were talking about you. For example: Ná bí ag magadh fúinn., Don't be making fun of us.

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