stun

1 to make senseless or dizzy by a blow a powerful uppercut to the jaw stunned the boxer and sent him crashing to the canvas Synonyms daze, rock Related Words deaden, knock out, paralyze; benumb, numb, stupefy; bowl over, knock down; bang, bash, belt, bludgeon, bonk, bop, clobber, clock, clout, hammer, hit, paste, pound, punch, rap, slam, slap, slug, smack, smite, sock, strike, swat, thump, thwack, wallop, whack, whale; batter, beat, buffet, bung, chop, cuff, drub, mangle, maul, pelt, pummel Phrases knock for a loop, knock silly

2 to make a strong impression on (someone) with something unexpected the news of President Kennedy's assassination stunned the nation Synonyms amaze, astonish, astound, bowl over, dumbfound (also dumfound), flabbergast, floor, rock, shock, startle, surprise, stupefy, thunderstrikeRelated Words befuddle, bewilder, blindside, blow away, confound, confuse, daze, discomfit, disconcert, dismay, jar, muddle, nonplus, perplex, shake up