vinegary

adjective

1. 1

   Sour; like vinegar.

   “When Martha reopened the bottle of wine from the previous week's party, a vinegary whiff indicated that drinking it was out of the question.”

2. 2

   Acerbic, bitter.

   “Edward's maiden aunt was a vinegary old soul with a sharp tongue and quick temper; she would not be receiving a wedding invitation.”

3. 3

   Of a liquid, having turned partially or fully to vinegar.