'Impassivity' definitions:

Definition of 'impassivity'

From: WordNet
noun
Apathy demonstrated by an absence of emotional reactions [syn: emotionlessness, impassivity, impassiveness, phlegm, indifference, stolidity, unemotionality]

Definition of 'Impassivity'

From: GCIDE
  • Impassivity \Im`pas*siv"i*ty\, n. The quality of being insusceptible of feeling, pain, or suffering; impassiveness. [1913 Webster]