Meaning

noun a man who has been castrated and is incapable of reproduction

verb deprive of strength or vigor

verb edit by omitting or modifying parts considered indelicate

originLikely from an unattested sense of Middle English castrat (“(adjective) castrated; (noun) a castrated animal”), substantivized borrowing of Latin castrātus, perfect passive participle of castrō (“to prune, amputate, castrate”), see -ate (noun-forming suffix)).

Etymology from Wiktionary, CC BY-SA 3.0