Langimage
English

barm

|barm|

C2

🇺🇸

/bɑrm/

🇬🇧

/bɑːm/

yeast/fermentation foam

Etymology
Etymology Information

'barm' originates from Old English, specifically the word 'beorma', where 'beorma' meant 'yeast' or 'ferment'.

Historical Evolution

'barm' changed from Old English word 'beorma' and eventually became the modern English word 'barm'.

Meaning Changes

Initially, it meant 'yeast or the froth of fermentation', and over time it has retained that core meaning of 'fermentation foam or yeast used for leavening'.

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Meanings by Part of Speech

Noun 1

the froth or foam formed on fermenting liquids, especially beer; the yeast-rich scum produced during fermentation.

The brewer skimmed the barm from the top of the vat.

Synonyms

Noun 2

yeast used as a leavening agent in baking (barm used to make bread rise).

Traditional recipes called for barm to leaven the loaves.

Synonyms

yeastleaven

Verb 1

to cause to produce barm or to cover with barm; to ferment so that froth appears.

The wort began to barm after a few hours.

Synonyms

Verb 2

to leaven (dough) with barm; to use barm as a leavening agent.

She barmed the dough with a spoonful of fresh barm.

Synonyms

leaven

Last updated: 2026/01/17 09:32

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