Present participle of 'acetify'; the ongoing process of converting a substance into acetic acid or vinegar.
From 'acetify' (to convert to acetic acid) + '-ing' (present participle suffix). The root 'acetify' comes from Latin 'acetum' (vinegar) + '-fy' (to make).
When you watch something acetifying in a jar, you're observing one of the oldest biotechnologies—bacterial metabolism so reliable that humans figured it out 10,000 years ago without understanding what bacteria even were!
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