churnyoudaoicibaDictYouDict[churn 词源字典]
churn: [OE] It has been speculated that the term churn is based on the granular appearance cream takes on as it is stirred or agitated. The Old English noun cyrin comes from a prehistoric Germanic *kernjōn, which may be related to English corn and kernel and Latin grānum ‘grain’. The derived verb churn is a comparatively late creation, not appearing until the 15th century.
=> corn, grain, kernel[churn etymology, churn origin, 英语词源]
churn (n.)youdaoicibaDictYouDict
Old English cyrin, from Proto-Germanic *kernjon (cognates: Old Norse kirna, Swedish kärna, Danish kjerne, Dutch karn, Middle High German kern); probably akin to cyrnel "kernel" (see kernel) and describing the "grainy" appearance of churned cream.
churn (v.)youdaoicibaDictYouDict
mid-15c., chyrnen, from churn (n.). Extended senses are from late 17c. Intransitive sense is from 1735. Related: Churned; churning. To churn out, of writing, is from 1902.