grandiloquence (n.)youdaoicibaDictYouDict[grandiloquence 词源字典]
"lofty speaking or expression," 1580s, from Latin grandiloquentia, from grandiloquus "using lofty speech, bombastic," from grandis "big" (see grand (adj.)) + -loquus "speaking," from loqui "to speak" (see locution).[grandiloquence etymology, grandiloquence origin, 英语词源]