powerful enough to overwhelm or knock down / reduced in price, originally to a price below which an article would not be sold by the auctioneer / Capable of being taken apart for packing or removal.

(genetics) To employ the knockdown technique

An act of knocking down or the condition of being knocked down. / An overwhelming blow. / (slang, obsolete, uncountable) Very strong ale or beer.

plural of knockdown

present participle of knockdown

simple past tense and past participle of knockdown

(of a fight or battle) Markedly violent.