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“Tríothu” in Irish (through them): Meaning and Where It Comes From

Tríothu means through them. It is the preposition trí (through) and the pronoun siad (them) 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 “tríothu” comes from

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

tríthrough +
siadthem
=
tríothuthrough them

Through: tríom = through me, tríd an bhfuinneog = through the window.

“Tríothu” in the table of “trí”

Every form of trí with a pronoun. Tríothu is the last (they, them) row. Click any form to see its own page.

PronounIrishMeaningExample
mé (me)tríomthrough meChuaigh fuacht tríom ar maidin.A chill went through me this morning.
tú (you)tríotthrough youD'fhéach sé tríot ar an tsráid inné.He looked right through you on the street yesterday.
sé (him / it)trídthrough him / itTá poll sa chóta agus téann an ghaoth tríd.There is a hole in the coat and the wind goes through it.
sí (her / it)tríthithrough her / itBhí an fhuinneog salach, ní fhaca mé tríthi.The window was dirty; I couldn't see through it.
sinn (us)trínnthrough usChuaigh an ghaoth fhuar trínn.The cold wind went right through us.
sibh (you (plural))tríbhthrough you (plural)Gheobhaidh mé an t-eolas tríbh.I will get the information through you.
siad (them)tríothuthrough themTá na fuinneoga glan, is féidir leat feiceáil tríothu.The windows are clean; you can see through them.

“Tríothu” in sentences

Tá na fuinneoga glan, is féidir leat feiceáil tríothu.
The windows are clean; you can see through them.

“siad” with the other prepositions

The same pronoun, siad (them), joined to the other prepositions.

“Tríothu” in Irish: frequently asked questions

What does tríothu mean in Irish?

tríothu means through them: the preposition trí (through) joined to the pronoun siad (them). The next form is tríom, through me.

Is tríothu one word or two?

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

What are all the forms of trí with pronouns?

tríom (through me), tríot (through you), tríd (through him / it), tríthi (through her / it), trínn (through us), tríbh (through you (plural)), tríothu (through them).

When do I use tríothu?

Through: tríom = through me, tríd an bhfuinneog = through the window. For example: Tá na fuinneoga glan, is féidir leat feiceáil tríothu., The windows are clean; you can see through them.

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