clepsydra (n.)youdaoicibaDictYouDict[clepsydra 词源字典]
"ancient Greek water clock," 1640s, from Latinized form of Greek klepsydra, from stem of kleptein "to steal, to hide" (see kleptomania) + hydor "water" (see water (n.1)).[clepsydra etymology, clepsydra origin, 英语词源]