unexpressive
Un`ex*press"ive, a. 1. Not expressive; not having the power of utterance; inexpressive. 2. Incapable of being expressed; inexpressible; unutterable; ineffable. [Obs.] Run, run, Orlando; carve on every tree The fair, the chaste and unexpressive she. Shak. -- Un`ex*press"ive*ly, adv.