sour
sour
verb
To become or make something become unpleasant, bad-tempered, or spoiled.
"The argument began to sour their friendship."
adjective
Having a sharp, acidic taste, like lemons or fermented food.
"The unripe apples were incredibly sour."
adjective
Unpleasant, bad-tempered, or expressing resentment.
"He had a sour look on his face."
Thesaurus
Synonyms: malodorous, ill-smelling, stinky, rancid, unpleasant-smelling, malodourous, glowering, morose, glum, saturnine, dour, sullen
Antonyms: dulcify, dulcorate, edulcorate, sweet, sweeten