anhydrous (adj.)youdaoicibaDictYouDict[anhydrous 词源字典]
"containing no water," 1819, a modern coinage from Greek an-, privative prefix (see an- (1)), + hydor "water" (see water (n.1)). Greek did have anhydros "waterless," used of arid lands or corpses that had not been given proper funeral rites.[anhydrous etymology, anhydrous origin, 英语词源]