n. 25B6; adjective
a tart apple : SOUR, sharp, acid, acidic, zesty, tangy, piquant; lemony, acetic.
a tart reply : ACERBIC, sharp, biting, cutting, astringent, caustic, trenchant, incisive, barbed, scathing, sarcastic, acrimonious, nasty, rude, vicious, spiteful, venomous.
sweet, kind.