ETYM Latin acetum vinegar, from acere to be sour.
Sour; of vinegar. acetic acid, acid of vinegar.
Relating to or containing acetic acid.

Acetose; sour; of vinegar.

ETYM Latin acidus sour, from the root ak to be sharp: cf. French acide. Related to Acute.
(Chemistry) Containing acid.
1. Harsh or corrosive in tone
2. Being sour to the taste
3. Having the characteristics of an acid

1. Of a stern or strict bearing or demeanor; forbidding in aspect; SYN. stern.
2. Severely simple; SYN. severe, stark.
3. Strict in moral outlook; extremely simple; without ornamentation; severe; sharp.

Perversely irritable; SYN. crabby, cross, fussy, grouchy, grumpy, bad-tempered, ill-tempered.

1. Having or made by a thin edge or sharp point; suitable for cutting or piercing
2. Keenly and painfully felt; as if caused by a sharp edge or point
3. Quick and forceful
4. Very sudden and in great amount or degree
5. Harsh; SYN. sharp-worded, tart.
6. (Music) Raised in pitch by one chromatic semitone

1. Having a sharp biting taste.
2. One of the four basic taste sensations; like the taste of vinegar or lemons.
3. Smelling of fermentation or staleness; SYN. rancid.

ETYM as. teart. Related to Tear.
1. Sharp to the taste; acid; sour.
2. (Figurative) Sharp; keen; severe.

Vinegary.

1. Resembling vinegar; sour
2. Flavored with vinegar
3. Disagreeable, bitter, or irascible in character or manner