caravanserai (n.)youdaoicibaDictYouDict[caravanserai 词源字典]
1590s, carvanzara, "Eastern inn (with a large central court) catering to caravans," ultimately from Persian karwan-sarai, from karwan (see caravan) + sara'i "palace, mansion; inn," from Iranian base *thraya- "to protect" (see seraglio).[caravanserai etymology, caravanserai origin, 英语词源]
cleanser (n.)youdaoicibaDictYouDict
1520s, "a purgative;" 1560s, "one who cleans," agent noun from cleanse (v.). Meaning "thing that cleanses" is from late 14c. Old English had clænsere "priest."
manservant (n.)youdaoicibaDictYouDict
also man-servant, 1550s, from man (n.) + servant.
merganser (n.)youdaoicibaDictYouDict
type of duck, 1752, coined in Modern Latin (1550s), from Latin mergus "waterfowl, diver" (from mergere "to dip, immerse;" see merge (v.)) + anser "goose" (see goose (n.)).
anserineyoudaoicibaDictYouDict
"Of or like a goose", Mid 19th century: from Latin anserinus, from anser 'goose'.