sip (v.)youdaoicibaDictYouDict[sip 词源字典]
late 14c., of uncertain origin, perhaps from a source related to Low German sippen "to sip," or from Old English sypian "absorb, drink in," related to supan "to take into the mouth a little at a time" (see sup (v.2)). Related: Sipped; sipping.[sip etymology, sip origin, 英语词源]
sip (n.)youdaoicibaDictYouDict
c. 1500, from sip (v.).