tartest (adjective) tart: bitter, sour in taste or effect
Sinonime: acerb,
acerbic, acetose, acid, acidulous,
acrimonious, astringent, barbed,
biting,
caustic,
cutting,
dry,
harsh,
nasty,
piquant,
pungent, scathing,
sharp,
short, snappish, snappy, snippy, tangy, testy,
trenchant, vinegary, wounding
Antonime: sweet