Synonyms of flail in English:

flail


See definition of flail

verb

1‘he fell headlong, his arms flailing’

SYNONYMS

wave, swing, thrash about, flap about, beat about, windmill, move erratically

2‘I was flailing about in the water’

SYNONYMS

flounder, struggle, thrash, thresh, squirm, wriggle, writhe, twist, splash, stumble, blunder, fumble, wiggle, twitch

3‘he flailed their shoulders with his cane’

SYNONYMS

thrash, beat, strike, batter, drub, flog, whip, lash, scourge, flay, flagellate, strap, switch, tan, cane, tan someone's hide, whip someone's hide, give someone a hiding, beat the living daylights out of, clout, welt, belabour

informal wallop, whack, lam, give someone a hiding, give someone a good hiding, larrup