knockout

nouns

a very attractive or seductive looking woman
beauty, dish, knockout, looker, lulu, mantrap, peach, ravisher, smasher, stunner, sweetheart
a blow that renders the opponent unconscious
KO, kayo, knockout
is derived from
knock out

adjectives

very strong or vigorous
"strong winds"; "a hard left to the chin"; "a knockout punch"; "a severe blow"
hard, knockout, severe