Knock. 1- Leaving someone out of combat, leaving them unconscious or very hurt. 2- In popular jargon, leave something or someone very affected. Example: "Covid-19 knocked out many people."
Castilianization as Word of the English expression " knock out " ( " hit that leaves out " ). In boxing, it is the blow that leaves out an opponent. See: knockout.
KNOCK OUT: OUT FOR A FIGHT.DOWN BY KNOCKOUT TO A PERSON.TERM USED IN BOXING.