Answer: acidulous

AnswerCrossword Clue
ACIDULOUSSourish.
ACIDULOUSSharp with asperity.
ACIDULOUSCaustic
ACIDULOUSSour
ACIDULOUSTartish
ACIDULOUSSlightly sour
aciduloushaving an acid quality also ACIDULENT
acidulousSharp-tasting or sour
acidulous(of a person's remarks or tone) Bitter or cutting