porous (adj.)youdaoicibaDictYouDict[porous 词源字典]
late 14c., "full of pores," from Old French poros (14c., Modern French poreux), from Medieval Latin porosus; or directly from Latin porus "an opening" (see pore (n.)). Figurative use from 1640s.[porous etymology, porous origin, 英语词源]