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Yeast in Irish (Giosta): Meaning, Pronunciation, Usage

The Irish for yeast is giosta, a masculine noun (plural giostaí).
Updated October 2026Report a mistake

How to say “yeast” in Irish

Irish:
giosta
English:
yeast
Word type:
noun
Gender:
masculine, fourth declension
Pronunciation:
“GISS-tuh”  /ˈɟɪsˠt̪ˠə/
Various forms
Plural:
giostaí (yeasts)
Genitive singular:
giosta, an ghiosta (e.g. boladh an ghiosta, the smell of the yeast)
Genitive plural:
giostaí, na ngiostaí (e.g. saothrú na ngiostaí, the cultivation of yeasts)

What does “giosta” mean?

yeast
A fungus used to make bread rise and to ferment beer and other drinks.Also: barm, leaven.

“Giosta” with the article

The plural of yeast in Irish is giostaí. Here is giosta after the article (an t-alt), in the singular and the plural.

an giosta
the yeast
No change after an
na giostaí
the yeasts
Plural: no change after na

“Giosta” in a sentence: Irish examples

Common Irish sentences using giosta, the Irish word for yeast.

Cuir giosta leis an bplúr ar dtús.
Add yeast to the flour first.
Níl an giosta ag obair ar chor ar bith.
The yeast isn't working at all.
Cheannaigh mé paicéad giosta sa siopa.
I bought a packet of yeast in the shop.
Tá an giosta sa chuisneoir.
The yeast is in the fridge.
Úsáidtear giostaí éagsúla chun beoir a dhéanamh.
Different yeasts are used to make beer.
Ní raibh go leor giosta san arán.
There wasn't enough yeast in the bread.
Déantar arán sóide gan ghiosta.
Soda bread is made without yeast.

Other nouns in Irish

More everyday Irish nouns to learn next.

Yeast in Irish: frequently asked questions

What is the Irish for yeast?

The Irish for yeast is giosta (pronounced “GISS-tuh”). It’s a masculine noun and the plural is giostaí.

How do you pronounce giosta in Irish?

Giosta is said like “GISS-tuh” (IPA /ˈɟɪsˠt̪ˠə/).

What is the plural of yeast in Irish?

The plural of giosta is giostaí; with the article, na giostaí means “the yeasts”. The genitive plural is giostaí, as in saothrú na ngiostaí (the cultivation of yeasts).

Why does giosta change to ghiosta or ngiosta?

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

Is soda bread made with giosta?

No, arán sóide is raised with bread soda (sóid aráin), not giosta; yeast bread is called arán giosta.

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