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Octagon in Irish (Ochtagán): Meaning, Pronunciation, Usage

The Irish for octagon is ochtagán, a masculine noun (plural ochtagáin).
Updated October 2026Report a mistake

How to say “octagon” in Irish

Irish:
ochtagán
English:
octagon
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“OKH-tuh-gawn”  /ˈɔxt̪ˠəɡaːnˠ/
Various forms
Plural:
ochtagáin (octagons)
Genitive singular:
ochtagáin, an ochtagáin (e.g. taobhanna an ochtagáin, the sides of the octagon)
Genitive plural:
ochtagán, na n-ochtagán (e.g. taobhanna na n-ochtagán, the sides of the octagons)

What does “ochtagán” mean?

octagon
A flat shape with eight straight sides and eight angles.Also: eight-sided figure, eight-sided shape.

“Ochtagán” with the article

The plural of octagon in Irish is ochtagáin. Here is ochtagán after the article (an t-alt), in the singular and the plural.

an t-ochtagán
the octagon
Masculine nouns take t before a vowel after an
na hochtagáin
the octagons
Plural: na adds h before a vowel

“Ochtagán” in a sentence: Irish examples

Common Irish sentences using ochtagán, the Irish word for octagon.

Tá ocht dtaobh ag ochtagán.
An octagon has eight sides.
Tharraing an múinteoir ochtagán ar an gclár.
The teacher drew an octagon on the board.
Is ochtagán é comhartha stad.
A stop sign is an octagon.
Tomhais imlíne an ochtagáin, le do thoil.
Measure the perimeter of the octagon, please.
Gearrann na páistí ochtagáin as páipéar daite.
The children cut octagons out of coloured paper.
Tá patrún ochtagán ar an urlár.
There is a pattern of octagons on the floor.
Cé mhéad uillinn atá san ochtagán seo?
How many angles are in this octagon?

Other nouns in Irish

More everyday Irish nouns to learn next.

Octagon in Irish: frequently asked questions

What is the Irish for octagon?

The Irish for octagon is ochtagán (pronounced “OKH-tuh-gawn”). It’s a masculine noun and the plural is ochtagáin.

How do you pronounce ochtagán in Irish?

Ochtagán is said like “OKH-tuh-gawn” (IPA /ˈɔxt̪ˠəɡaːnˠ/).

What is the plural of octagon in Irish?

The plural of ochtagán is ochtagáin; with the article, na hochtagáin means “the octagons”. The genitive plural is ochtagán, as in taobhanna na n-ochtagán (the sides of the octagons).

Why does ochtagán sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an t-ochtagán (the octagon), a hochtagán (her octagon), a n-ochtagán (their octagon), na hochtagáin (the octagons).

How do I say 'octagonal' in Irish?

The adjective is 'ochtagánach', for example 'seomra ochtagánach', an octagonal room.

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