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tempered adj. excitable, impulsive, temperamental, hot-tempered, waspish, choleric, splenetic, impatient, short-tempered, touchy, irascible, irritable, snappish, abrupt, short, short-spoken, quarrelsome, testy, volatile, hot-blooded, bad-tempered, ill-tempered, churlish, highly-strung, US high-keyed Len is very quick-tempered these days and flies into a rage at the slightest provocation