adj. 25B6; adjective
a peppery sauce : SPICY, spiced, peppered, hot, highly seasoned, piquant, pungent, sharp.
a peppery old man : IRRITABLE, cantankerous, irascible, bad-tempered, ill-tempered, grumpy, grouchy, crotchety, short-tempered, tetchy, testy, crusty, crabby, curmudgeonly, peevish, cross, fractious, pettish, prickly, waspish; informal snappish, snappy, chippy; N. Amer. informal cranky, ornery.
mild, bland, affable.