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