'Impassively' definitions:

Definition of 'impassively'

From: WordNet
adverb
In an impassive manner; "he submitted impassively to his arrest"

Definition of 'Impassively'

From: GCIDE
  • Impassive \Im*pas"sive\, a. Not susceptible of pain or suffering; apathetic; impassible; unmoved. [1913 Webster]
  • Impassive as the marble in the quarry. --De Quincey. [1913 Webster]
  • On the impassive ice the lightings play. --Pope. -- {Im*pas"sive*ly}, adv. -- {Im*pas"sive*ness}, n. [1913 Webster]