vinegary
adjective
Definitions
Sour; like vinegar.
Example: 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.
Acerbic, bitter.
Example: Edward's maiden aunt was a vinegary old soul with a sharp tongue and quick temper; she would not be receiving a wedding invitation.
Of a liquid, having turned partially or fully to vinegar.