Akademik

vinegar
n.
1 a sour liquid obtained from wine, cider, etc., by fermentation and used as a condiment or for pickling.
2 sour behaviour or character.
Derivatives:
vinegarish adj. vinegary adj.
Etymology: ME f. OF vyn egre ult. f. L vinum wine + acer, acre sour

Useful english dictionary. 2012.