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Definition of ferment verb from the Oxford Advanced Learner's Dictionary

ferment

verb
 
/fəˈment/
 
/fərˈment/
[intransitive, transitive]
Verb Forms
present simple I / you / we / they ferment
 
/fəˈment/
 
/fərˈment/
he / she / it ferments
 
/fəˈments/
 
/fərˈments/
past simple fermented
 
/fəˈmentɪd/
 
/fərˈmentɪd/
past participle fermented
 
/fəˈmentɪd/
 
/fərˈmentɪd/
-ing form fermenting
 
/fəˈmentɪŋ/
 
/fərˈmentɪŋ/
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  1. to experience a chemical change because of the action of yeast or bacteria, often changing sugar to alcohol; to make something change in this way
    • Fruit juices ferment if they are kept for too long.
    • (figurative) A blend of emotions fermented inside her.
    • ferment something Red wine is fermented at a higher temperature than white.
    Word Originlate Middle English: from Old French ferment (noun), fermenter (verb), based on Latin fermentum ‘yeast’, from fervere ‘to boil’.
See ferment in the Oxford Advanced American Dictionary

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