niggleEnglishOxford American Thesaurusniggle verb 1 it does niggle me that we cannot play whenever and wherever we like: irritate, annoy, worry, trouble, bother, provoke, exasperate, upset, gall, irk, rankle with; informal rile, hack off, get, get to, bug; British, informal get up someone's nose. 2 he niggles on about the unemployed: complain, object, moan, fuss, nag, carp, cavil, find fault, grumble, grouse; Northern English mither, twine; informal nitpick.noun there were niggles about the lack of trim and equipment on some diesel cars: minor criticism, quibble, trivial objection, trivial complaint, adverse comment, moan, grumble, grouse, cavil; Northern English twine; informal gripe, beef, grouch, nitpicking; archaic pettifogging.