limpid (adj.)youdaoicibaDictYouDict[limpid 词源字典]
c. 1600, from French limpide (15c.) and directly from Latin limpidus "clear," from limpa "water goddess, water;" probably cognate with lympha "clear liquid" (see lymph). Related: Limpidly.[limpid etymology, limpid origin, 英语词源]