Pronunciation: (in"är-tik'yu-lit),[key] —adj. 1. lacking the ability to express oneself, esp. in clear and effective speech: an inarticulate public speaker. 2. unable to use articulate speech: inarticulate with rage. 3. not articulate; not uttered or emitted with expressive or intelligible modulations: His mouth stuffed, he could utter only inarticulate sounds. 4. not fully expressed or expressible: a voice choked with inarticulate agony. 5. Anat.,Zool.not jointed; having no articulation or joint.