cavernous (adj.)youdaoicibaDictYouDict[cavernous 词源字典]
c. 1400, "full of caverns," from Latin cavernosus "full of cavities" (source also of Italian cavernoso, French caverneux), from caverna (see cavern). Meaning "hollow" is recorded from 1830.[cavernous etymology, cavernous origin, 英语词源]