in·ar·tic·u·late / ˌinärˈtikyəlit/ • adj. 1. unable to speak distinctly or express oneself clearly: he was inarticulate with abashment and regret. ∎ not clearly expressed or pronounced: inarticulate complaints of inadequate remuneration. ∎ having no distinct meaning; unintelligible: lurching up and down uttering inarticulate cries. ∎ not expressed; unspoken: mention of her mother filled her with inarticulate irritation.2. without joints or articulations. ∎ Zool. denoting a brachiopod in which the valves of the shell have no hinge and are held together by muscles.DERIVATIVES: in·ar·tic·u·la·cy / -ləsē/ n.in·ar·tic·u·late·ly adv.in·ar·tic·u·late·ness n.