acetify
/əˈsiːtɪfʌɪ/ /əˈsɛtɪfʌɪ/verb
1 [with object] To subject to acetous fermentation in the manufacture of vinegar; to convert into vinegar.
2 [no object] To undergo acetous fermentation; to become vinegar.
Origin
Late 18th century. From classical Latin acētum acetum + -ify, after acetification.