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Three-sided in Irish (tríshleasach): Meaning, Forms, Examples

The Irish for three-sided is tríshleasach: seomra tríshleasach, a three-sided room.
Updated October 2026Report a mistake

How to say “three-sided” in Irish

Irish:
tríshleasach
English:
three-sided
Word type:
adjective
More three-sided:
níos tríshleasaí
Most three-sided:
is tríshleasaí
Plural:
tríshleasacha
Pronunciation:
“TREE-hlas-akh”  /ˈtʲɾʲiːˌhlʲasəx/

What does “tríshleasach” mean?

three-sided
Having three sides, like a triangle.Also: trilateral, triangular.

“Tríshleasach” after a noun

An Irish adjective comes after its noun. Here is tríshleasach after seomra (room, masculine), after fuinneog (window, feminine) and after a plural.

after a masculine nounseomra tríshleasacha three-sided room
after a feminine nounfuinneog thríshleasacha three-sided window
after a plural nounseomraí tríshleasachathree-sided rooms

séimhiú (the h) the ending

feminine
fuinneogwindow
+
tríshleasachthree-sided
=
fuinneog thríshleasacha three-sided window

After a feminine noun the adjective gets a séimhiú, an h after its first letter: fuinneog thríshleasach. After a masculine noun it stays as it is: seomra tríshleasach.

plural
seomraírooms
+
tríshleasachathree-sided, plural
=
seomraí tríshleasachathree-sided rooms

With a plural noun the adjective takes its plural form, tríshleasacha. It also gets an h after a plural that ends in a slender consonant; after other plurals it does not: fuinneoga tríshleasacha.

More three-sided, most three-sided, very three-sided

níosmore
+
tríshleasaíthree-sided
=
níos tríshleasaímore three-sided
ismost
+
tríshleasaíthree-sided
=
is tríshleasaímost three-sided

Tá an cruth seo níos tríshleasaí ná an ceann eile. This shape is more three-sided than the other one.

more three-sidedníos tríshleasaíin the past tense: ní ba thríshleasaí
most three-sidedis tríshleasaíin the past tense: ba thríshleasaí
as three-sided aschomh tríshleasach leno change after chomh
very three-sidedan-tríshleasachan- lenites, except d, t and s
too three-sidedróthríshleasachró- lenites

“Tríshleasach” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Tharraing sé cruth tríshleasach ar an gclár.
He drew a three-sided shape on the board.
Tá fuinneog thríshleasach sa seomra sin.
There is a three-sided window in that room.
Gearr amach na cruthanna tríshleasacha.
Cut out the three-sided shapes.
Tá an cruth seo níos tríshleasaí ná an ceann eile.
This shape is more three-sided than the other one.
Tá an cruth sin tríshleasach.
That shape is three-sided.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Three-sided in Irish: frequently asked questions

What is the Irish for three-sided?

The Irish for three-sided is tríshleasach (pronounced “TREE-hlas-akh”). It comes after the noun: seomra tríshleasach, a three-sided room; fuinneog thríshleasach, a three-sided window.

How do you say more three-sided and most three-sided in Irish?

níos tríshleasaí is more three-sided and is tríshleasaí is most three-sided. In the past tense they become ní ba thríshleasaí and ba thríshleasaí.

Why does tríshleasach become thríshleasach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So fuinneog thríshleasach (a three-sided window) but seomra tríshleasach (a three-sided room), because seomra is masculine.

What is the plural of tríshleasach?

With a plural noun tríshleasach becomes tríshleasacha: seomraí tríshleasacha, fuinneoga tríshleasacha.

How do you say very three-sided in Irish?

an-tríshleasach. Too three-sided is róthríshleasach, and as three-sided as is chomh tríshleasach le.

What is the difference between 'tríshleasach' and 'triantánach'?

'Tríshleasach' means having three sides, while 'triantánach' means triangular, shaped like a 'triantán'. They often describe the same shape.

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