keepyoudaoicibaDictYouDict[keep 词源字典]
keep: [OE] For all that it is one of the commonest verbs in the language, remarkably little is known about the history of keep. It first appears in texts around the year 1000. It is assumed to have existed before then, but not to have belonged to a sufficiently ‘literary’ level of the language to have been written down. Nor has a link been established for certain with any words in other Germanic languages, although suggestions that have been put forward include Old High German kuofa ‘barrel’ (a relative of English coop), from the notion of its being something for ‘keeping’ things in, and also (since in the late Old English period keep was used for ‘watch’) Old Norse kópa ‘stare’.
[keep etymology, keep origin, 英语词源]
keep (v.)youdaoicibaDictYouDict
late Old English cepan "to seize, hold," also "to observe," from Proto-Germanic *kopijan, but with no certain connection to other languages. It possibly is related to Old English capian "to look," from Proto-Germanic *kap- (cepan was used c. 1000 to render Latin observare), which would make the basic sense "to keep an eye on."
The word prob. belongs primarily to the vulgar and non-literary stratum of the language; but it comes up suddenly into literary use c. 1000, and that in many senses, indicating considerable previous development. [OED]
Sense of "preserve, maintain" is from mid-14c. Meaning "to maintain in proper order" is from 1550s; meaning "financially support and privately control" (usually in reference to mistresses) is from 1540s. Related: Kept; keeping.
keep (n.)youdaoicibaDictYouDict
mid-13c., "care or heed in watching," from keep (v.). Meaning "innermost stronghold of a tower" is from 1580s, perhaps a translation of Italian tenazza, with a notion of "that which keeps" (someone or something); the sense of "food required to keep a person or animal" is attested from 1801. For keeps "completely, for good" is American English colloquial, from 1861.