shopyoudaoicibaDictYouDict[shop 词源字典]
shop: [13] The word shop had humble beginnings. It goes back to a prehistoric Germanic *skoppan, which denoted a small additional structure, such as a lean-to shed or a porch. There is one isolated example of an Old English descendant of this – sceoppa, which denoted a ‘treasury’ – but this does not appear to have survived. The modern English word was borrowed from Old French eschoppe ‘booth, stall’, which in turn had got it from Middle Low German schoppe.

German dialect schopf ‘shed, shelter’ comes from the same source. The verb shop originated in the 16th century, in the sense ‘imprison’ (reflecting a now obsolete slang use of the noun shop for ‘prison’). This is the ancestor of modern British slang shop ‘inform against’. The sense ‘visit shops to buy things’ emerged in the mid 18th century.
[shop etymology, shop origin, 英语词源]
shop (n.)youdaoicibaDictYouDict
c. 1300, "booth or shed for trade or work," perhaps from Old English scoppa, a rare word of uncertain meaning, apparently related to scypen "cowshed," from Proto-Germanic *skoppan "small additional structure" (cognates: Old High German scopf "building without walls, porch," German dialectal Scopf "porch, cart-shed, barn," German Schuppen "a shed"), from root *skupp-. Or the Middle English word was acquired from Old French eschoppe "booth, stall" (Modern French échoppe), which is a Germanic loan-word from the same root.

Meaning "building or room set aside for sale of merchandise" is from mid-14c. Meaning "schoolroom equipped for teaching vocational arts" is from 1914, American English. Sense of "matters pertaining to one's trade" is from 1814 (as in talk shop (v.), 1860).
shop (v.)youdaoicibaDictYouDict
1680s, "to bring something to a shop, to expose for sale," from shop (n.). The meaning "to visit shops for the purpose of examining or purchasing goods" is first attested 1764. Related: Shopped; shopping. Shop around is from 1922. Shopping cart is recorded from 1956; shopping list first attested 1913; transferred and figurative use is from 1959.