cavil

to make often peevish criticisms or objections about matters that are minor, unimportant, or irrelevant caviled for hours about a single sentence Synonyms carp, quibble, fuss, niggle, nitpickRelated Words criticize, fault; beef, bellyache, bitch, complain, crab, croak, gripe, grouse, growl, grumble, kick, kvetch, moan, squawk, squeal, wail, whimper, whine, yammer, yawp (or yaup), yowl; murmur, mutterNear Antonyms applaud, commend, compliment, praise, recommend; approve, back, champion, endorse (also indorse), support