half
1
n bisection, division, equal part, fifty per cent, fraction, hemisphere, portion, section
2
adj divided, fractional, halved, incomplete, limited, moderate, partial
3
adv after a fashion, all but, barely, inadequately, incompletely, in part, partially, partly, pretty nearly, slightly
4 by half considerably, excessively, very much
half-baked
1 brainless, crackpot (informal) crazy, foolish, harebrained, inane, loopy (informal) senseless, silly, stupid
2 ill-conceived, ill-judged, impractical, poorly planned, short-sighted, unformed, unthought out or through
half-hearted
apathetic, cool, half-arsed (Brit. slang) half-assed (U.S. & Canad. slang) indifferent, lacklustre, listless, lukewarm, neutral, passive, perfunctory, spiritless, tame, unenthusiastic, uninterested
Antonyms
ambitious, animated, avid, concerned, determined, eager, emotional, energetic, enthusiastic, excited, spirited, warm, wholehearted, zealous
half-witted
addle-brained, barmy (slang) batty (slang) crazy, doltish, doolally (slang) dull, dull-witted, feeble-minded, flaky (U.S. slang) foolish, goofy (informal) idiotic, moronic, nerdish or nurdish (slang) obtuse, silly, simple, simple-minded, stupid