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Biodiversity in Irish (Bithéagsúlacht): Meaning, Pronunciation, Usage

The Irish for biodiversity is bithéagsúlacht, a feminine noun (plural bithéagsúlachtaí).
Updated October 2026Report a mistake

How to say “biodiversity” in Irish

Irish:
bithéagsúlacht
English:
biodiversity
Word type:
noun
Gender:
feminine, third declension
Pronunciation:
“BIH-hay-guh-soo-lukht”  /ˈbʲɪheːɡəsˠuːləxt̪ˠ/
Various forms
Plural:
bithéagsúlachtaí (biodiversities)
Genitive singular:
bithéagsúlachta, na bithéagsúlachta (e.g. caomhnú na bithéagsúlachta, conservation of biodiversity)
Genitive plural:
bithéagsúlachtaí, na mbithéagsúlachtaí (e.g. comparáid na mbithéagsúlachtaí, the comparison of biodiversities)

What does “bithéagsúlacht” mean?

biodiversity
The variety of plant and animal life in a particular place or in the world as a whole.Also: biological diversity, diversity of life.

“Bithéagsúlacht” with the article

The plural of biodiversity in Irish is bithéagsúlachtaí. Here is bithéagsúlacht after the article (an t-alt), in the singular and the plural.

an bhithéagsúlacht
the biodiversity
Lenition: b becomes bh after an (feminine noun)
na bithéagsúlachtaí
the biodiversities
Plural: no change after na

“Bithéagsúlacht” in a sentence: Irish examples

Common Irish sentences using bithéagsúlacht, the Irish word for biodiversity.

Tá an bhithéagsúlacht ag laghdú ar fud an domhain.
Biodiversity is declining all over the world.
Is tábhachtach bithéagsúlacht don chomhshaol.
Biodiversity is important for the environment.
Rinneamar staidéar ar chaomhnú na bithéagsúlachta ar scoil.
We studied biodiversity conservation at school.
Tá bithéagsúlacht shaibhir sa phortach seo.
There is rich biodiversity in this bog.
Cuireann truailliú isteach go mór ar an mbithéagsúlacht.
Pollution has a big effect on biodiversity.
Tá plean nua ag an rialtas don bhithéagsúlacht.
The government has a new plan for biodiversity.
Cabhraíonn fálta sceach le bithéagsúlacht na tuaithe.
Hedgerows help the biodiversity of the countryside.

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Biodiversity in Irish: frequently asked questions

What is the Irish for biodiversity?

The Irish for biodiversity is bithéagsúlacht (pronounced “BIH-hay-guh-soo-lukht”). It’s a feminine noun and the plural is bithéagsúlachtaí.

How do you pronounce bithéagsúlacht in Irish?

Bithéagsúlacht is said like “BIH-hay-guh-soo-lukht” (IPA /ˈbʲɪheːɡəsˠuːləxt̪ˠ/).

What is the plural of biodiversity in Irish?

The plural of bithéagsúlacht is bithéagsúlachtaí; with the article, na bithéagsúlachtaí means “the biodiversities”. The genitive plural is bithéagsúlachtaí, as in comparáid na mbithéagsúlachtaí (the comparison of biodiversities).

Why does bithéagsúlacht change to bhithéagsúlacht or mbithéagsúlacht?

Irish changes the start of some words after certain words. After mo (my) bithéagsúlacht becomes mo bhithéagsúlacht (lenition), and after ár (our) or i (in) it becomes ár mbithéagsúlacht (eclipsis).

How is 'bithéagsúlacht' formed?

It combines the prefix 'bith-' (life, as in 'bitheolaíocht', biology) with 'éagsúlacht' (variety, diversity).

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