impassivity

noun

1. (uncountable, usually)The state of being impassive.

   “He wore gold-rimmed pince-nez, and had a curious impassivity of feature. It struck me that he might look natural on a stage, but was strangely out of place in real life.”

   “[T]hey were baffled by tears in moustached sixth-formers, by walls of impassivity in the Lower School, by silent conspiracies which nullified the rules.”