inarticulate
in.ar.tic.u.late \.in-(.)a:r-'tik-y*-l*t\ aj [LL inarticulatus, fr. L in- + articulatus, pp. of articul] [NL inarticulatus, fr. L in- + NL articulatus articulate]are to utter distinctly - more at ARTICULATE of a sound 1a: uttered or formed without the definite articulations of intelligible s peech 1b1: incapable of speech esp. under stress of emotion : MUTE 1b2: incapable of being expressed by speech 1b3: UNSPOKEN 2: incapable of giving coherent, clear, or effective expression to one's i deas or feelings 3a: having no distinct body segments 3b: lacking a hinge - used esp. of a brachiopod shell - in.ar.tic.u.late.ly av
Webster's English Dictionary