Definition & Meaning of "eunuch"in English

What is the origin of the term "eunuch" and how is it used?

"Eunuch" comes from the Greek eunouchos, originally meaning a man who has been castrated, often employed in royal courts to guard women or serve in administrative roles. By the 18th–19th centuries, the term was extended metaphorically in English to describe men perceived as weak, effeminate, or powerless, implying a lack of masculinity or authority. It has appeared in literature, political rhetoric, and insults to belittle men, and is clearly derogatory, carrying strong negative connotations about gender and strength.