HeyRua Get the app

Triangular in Irish (triantánach): Meaning, Forms, Examples

The Irish for triangular is triantánach: seol triantánach, a triangular sail.
Updated October 2026Report a mistake

How to say “triangular” in Irish

Irish:
triantánach
English:
triangular
Word type:
adjective
More triangular:
níos triantánaí
Most triangular:
is triantánaí
Plural:
triantánacha
Pronunciation:
“TREE-un-taw-nukh”  /ˈtʲɾʲiən̪ˠt̪ˠaːn̪ˠəx/

What does “triantánach” mean?

triangular
Having the shape of a triangle, with three sides and three corners.Also: three-cornered, triangle-shaped, deltoid.

“Triantánach” after a noun

An Irish adjective comes after its noun. Here is triantánach after seol (sail, masculine), after oifig (office, feminine) and after a plural.

after a masculine nounseol triantánacha triangular sail
after a feminine nounoifig thriantánacha triangular office
after a plural nounseolta triantánachatriangular sails

séimhiú (the h) the ending

feminine
oifigoffice
+
triantánachtriangular
=
oifig thriantánacha triangular office

After a feminine noun the adjective gets a séimhiú, an h after its first letter: oifig thriantánach. After a masculine noun it stays as it is: seol triantánach.

plural
seoltasails
+
triantánachatriangular, plural
=
seolta triantánachatriangular sails

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

More triangular, most triangular, very triangular

níosmore
+
triantánaítriangular
=
níos triantánaímore triangular
ismost
+
triantánaítriangular
=
is triantánaímost triangular

Tá an pháirc seo níos triantánaí ná an ceann eile. This field is more triangular than the other one.

more triangularníos triantánaíin the past tense: ní ba thriantánaí
most triangularis triantánaíin the past tense: ba thriantánaí
as triangular aschomh triantánach leno change after chomh
very triangularan-triantánachan- lenites, except d, t and s
too triangularróthriantánachró- lenites

“Triantánach” in a sentence: Irish examples

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

Bhí seol triantánach ar an mbád.
The boat had a triangular sail.
Fuair mé cloch thriantánach ar an trá.
I found a triangular stone on the beach.
Ghearr sí na ceapairí ina bpíosaí triantánacha.
She cut the sandwiches into triangular pieces.
Tá an pháirc seo níos triantánaí ná an ceann eile.
This field is more triangular than the other one.
Tá an comhartha bóthair triantánach.
The road sign is triangular.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Triangular in Irish: frequently asked questions

What is the Irish for triangular?

The Irish for triangular is triantánach (pronounced “TREE-un-taw-nukh”). It comes after the noun: seol triantánach, a triangular sail; oifig thriantánach, a triangular office.

How do you say more triangular and most triangular in Irish?

níos triantánaí is more triangular and is triantánaí is most triangular. In the past tense they become ní ba thriantánaí and ba thriantánaí.

Why does triantánach become thriantánach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So oifig thriantánach (a triangular office) but seol triantánach (a triangular sail), because seol is masculine.

What is the plural of triantánach?

With a plural noun triantánach becomes triantánacha: seolta triantánacha, oifigí triantánacha.

How do you say very triangular in Irish?

an-triantánach. Too triangular is róthriantánach, and as triangular as is chomh triantánach le.

What noun is 'triantánach' related to?

It comes from the noun 'triantán', meaning a triangle, so 'cruth triantánach' is a triangular shape.

Learn Irish by
actually speaking it

Learn everyday Irish words like triantánach through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen