floor

the surface upon which a body of water lies discovered a new species of crab living on the ocean floor Synonyms bed, bottomRelated Words riverbed; base, basement, foundation, groundNear Antonyms surface

1 to cause an unpleasant surprise for that you would say such a rude thing to my mother floors me Synonyms appall (also appal), shock, jolt, shake upRelated Words astonish, bowl over, dumbfound (also dumfound), flabbergast, freak (out), stun, stupefy; affright, alarm (also alarum), dismay, fright, frighten, horrify, panic, scare, scarify, spook, startle, terrify, terrorize; disgust, nauseate, repel, revolt, sicken, turn off; displease, offend, outrage, scandalize; amaze, astound, awe; chill, daunt, demoralize, dispirit, emasculate, undo, unman, unnerve, unstring; discomfort, discompose, disconcert, disquiet, distress, disturb, perturb, shake, unsettle, upset, weird out; crush, overpower, overwhelmNear Antonyms buffer, cushion; delight, gratify, please, rejoice, tickle; charm, entice, tempt; assure, cheer, comfort, console, solace, soothe; reassure

2 to make a strong impression on (someone) with something unexpected as you might expect, winning the lottery simply floored us Synonyms amaze, astonish, astound, bowl over, dumbfound (also dumfound), flabbergast, surprise, rock, shock, startle, stun, stupefy, thunderstrikeRelated Words befuddle, bewilder, blindside, blow away, confound, confuse, daze, discomfit, disconcert, dismay, jar, muddle, nonplus, perplex, shake up

3 to strike (someone) so forcefully as to cause a fall the boxer floored his opponent in the second round, winning the fight by a knockout Synonyms bowl (down or over), down, drop, fell, knock down, knock over, level, mow (down), prostrateRelated Words kayo, knock out, KO; overthrow, throw down, topple; bang, bash, belt, bludgeon, clobber, hammer, hit, jab, paste, poke, pound, punch, slam, slap, slog, slug, smack, smite, sock, swat, swipe, thump, thwack, wallop, whack, whale

4 to subject to incapacitating emotional or mental stress the pushing and shoving at the clearance sale absolutely floored me, and I had to leave Synonyms crush, devastate, overwhelm, grind (down), oppress, overcome, overmaster, overpower, prostrate, snow under, swamp, whelmRelated Words deluge, drown, sink; confute, defeat, refute; break, demoralize, distress, disturb, rock, shatter, stagger, throw, unman, unnerve, upset