flatten

1 to make free from breaks, curves, or bumps flattened out the wrinkled paper before attempting to trace the pattern Synonyms even, level, plane, smooth, smoothenRelated Words clip, crop, pare, prune, shave, trim; lay, press, spread; card, comb, rake; surfaceNear Antonyms coarsen, rumple, wrinkle; bend, kink; dent, pitAntonyms rough, roughen

2 to defeat by a large margin if you don't understand the rules, you're going to get flattened when you try to play Synonyms annihilate, blow away, bomb, bury, clobber, cream, drub, dust, whip, paste, rout, shellac, skin, skunk, smoke [slang], smother, snow under, thrash, trim, tromp, trounce, wallop, wax [slang], whomp, whop (or whap), whupRelated Words sweep, upset; beat, best, conquer, dispatch, hurdle, lick, master, overbear, overcome, overmatch, prevail (over), subdue, surmount, take, throw, triumph (over), win (against), worst; crush, knock off, knock over, overpower, overthrow, overwhelm, subjugate, upend, vanquish; ace (out), better, eclipse, exceed, outdistance, outdo, outfight, outshine, outstrip, overtop, surpass, top, transcend; edge (out), nose out, pip [British]; cap, excel, flourish, score, succeed; break, destroy, do in, finish, sink, slaughter