carpetyoudaoicibaDictYouDict[carpet 词源字典]
carpet: [14] Originally, carpet was simply a sort of rough cloth, and medieval Latin carpīta, for example, was sometimes used for a garment made from it. In earliest English use it was a ‘table-cloth’ or ‘bed-spread’, and it was not until the 15th century that the specialized ‘floorcovering’ began to establish itself. The word itself entered English via either Old French carpite or medieval Latin carpīta, which was derived from carpīre, an alteration of Latin carpere ‘pluck’ (related to English harvest).

The underlying notion seems to be that such cloth was originally made from ‘plucked’ fabric, that is, fabric which had been unravelled or shredded.
[carpet etymology, carpet origin, 英语词源]
carpet (n.)youdaoicibaDictYouDict
late 13c., "coarse cloth;" mid-14c., "tablecloth, bedspread;" from Old French carpite "heavy decorated cloth, carpet," from Medieval Latin or Old Italian carpita "thick woolen cloth," probably from Latin carpere "to card, pluck," probably so called because it was made from unraveled, shreded, "plucked" fabric; from PIE *kerp- "to gather, pluck, harvest" (see harvest (n.)). Meaning shifted 15c. to floor coverings.

From 16c.-19c. as an adjective often with a tinge of contempt, when used of men (as in carpet-knight, 1570s) by association with luxury, ladies' boudoirs, and drawing rooms. On the carpet "summoned for reprimand" is 1900, U.S. colloquial (but compare carpet (v.) "call (someone) to be reprimanded," 1823, British servants' slang). To sweep or push something under the carpet in the figurative sense is first recorded 1953.
carpet (v.)youdaoicibaDictYouDict
"to cover with a carpet," 1620s, from carpet (n.). Meaning "call to reprimand" is from 1840. Related: Carpeted; carpeting.