pumiceyoudaoicibaDictYouDict[pumice 词源字典]
pumice: [15] Pumice comes via Old French pomis from Latin pūmex ‘pumice’. This went back to a prehistoric Indo-European *poimo-, source also of English foam and of Latin spūma ‘foam, froth’ (from which English gets spume).
=> foam, spume[pumice etymology, pumice origin, 英语词源]
pumice (n.)youdaoicibaDictYouDict
c. 1400, from Anglo-French and Old French pomis (13c.), from Late Latin pomicem (nominative pomex, genitive pumicis), from Oscan *poimex or some other dialectal variant of Latin pumex "pumice," from PIE *(s)poi-mo-, a root with connotations of "foam, froth" (see foam (n.)). Old English had pumic-stan. As a verb, early 15c., from the noun.