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Base area in Irish (Bonn-achar): Meaning, Pronunciation, Usage

The Irish for base area is bonn-achar, a masculine noun (plural bonn-achair).
Updated October 2026Report a mistake

How to say “base area” in Irish

Irish:
bonn-achar
English:
base area
Word type:
noun
Gender:
masculine
Pronunciation:
“BUN-akh-ur”  /ˈbˠʊnˠ ˌaxəɾˠ/
Various forms
Plural:
bonn-achair (base areas)
Genitive singular:
bonn-achair, an bhonn-achair (e.g. méid an bhonn-achair, size of the base area)
Genitive plural:
bonn-achar, na mbonn-achar (e.g. suim na mbonn-achar, sum of the base areas)

What does “bonn-achar” mean?

base area
In mathematics, the area of the base of a solid figure such as a prism, cylinder or cone.Also: area of base, base.

“Bonn-achar” with the article

The plural of base area in Irish is bonn-achair. Here is bonn-achar after the article (an t-alt), in the singular and the plural.

an bonn-achar
the base area
No change after an
na bonn-achair
the base areas
Plural: no change after na

“Bonn-achar” in a sentence: Irish examples

Common Irish sentences using bonn-achar, the Irish word for base area.

Ríomh bonn-achar an tsorcóra.
Calculate the base area of the cylinder.
Tá an bonn-achar cothrom le fiche ceintiméadar cearnach.
The base area is equal to twenty square centimetres.
Méadaigh an bonn-achar faoin airde.
Multiply the base area by the height.
Tá luach an bhonn-achair sa cheist.
The value of the base area is in the question.
Tá an dá bhonn-achar cothrom le chéile.
The two base areas are equal.
Scríobh síos foirmle an bhonn-achair.
Write down the formula for the base area.
Tá botún i do bhonn-achar.
There is a mistake in your base area.

Other nouns in Irish

More everyday Irish nouns to learn next.

Base area in Irish: frequently asked questions

What is the Irish for base area?

The Irish for base area is bonn-achar (pronounced “BUN-akh-ur”). It’s a masculine noun and the plural is bonn-achair.

How do you pronounce bonn-achar in Irish?

Bonn-achar is said like “BUN-akh-ur” (IPA /ˈbˠʊnˠ ˌaxəɾˠ/).

What is the plural of base area in Irish?

The plural of bonn-achar is bonn-achair; with the article, na bonn-achair means “the base areas”. The genitive plural is bonn-achar, as in suim na mbonn-achar (sum of the base areas).

Why does bonn-achar change to bhonn-achar or mbonn-achar?

Irish changes the start of some words after certain words. After mo (my) bonn-achar becomes mo bhonn-achar (lenition), and after ár (our) or i (in) it becomes ár mbonn-achar (eclipsis).

How is 'bonn-achar' related to 'achar'?

'Achar' means area in maths, and 'bonn' means base, so 'bonn-achar' is the area of the base. Volume of a prism is the 'bonn-achar' multiplied by the 'airde'.

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