Impassive
Pronunciation : Im*pas"sive
Part of Speech : a.
Definition : Defn: Not susceptible of pain or suffering; apathetic; impassible; unmoved. Impassive as the marble in the quarry. De Quincey. On the impassive ice the lightings play. Pope. -- Im*pas"sive*ly, adv. -- Im*pas"sive*ness, n.
Source : Webster's Unabridged Dictionary, 1913