inarticulate (adj.)youdaoicibaDictYouDict[inarticulate 词源字典]
c. 1600, "not clear or intelligible" (of speech), from Late Latin inarticulatus "inarticulate, indistinct," from in- "not" (see in- (1)) + articulatus, past participle of articulare (see articulation). Related: Inarticulately; inarticulateness.[inarticulate etymology, inarticulate origin, 英语词源]