Definition of impassiveness in US English:

impassiveness

noun

  • See impassive

    • ‘Jen noticed the sharp intake of breath Michael took when he realized she was standing next to him; his entire body tensed up and a look of impassiveness took over his face.’
    • ‘I tried to keep my face a mask a perfect impassiveness, as he always did, but I knew I looked desperately hopeful.’
    • ‘Mirrored on the inside face, with etched glass on the exterior, the 20 mm thick panels reflect the changing light and climatic conditions, creating a sense of calm impassiveness and slight mystery.’
    • ‘This impassiveness or removal presents dilemma and difficulty when immediacy and accessibility has been anticipated.’
    • ‘He displays an impassiveness throughout the book in his reactions to the people and events described in the book.’

Pronunciation

impassiveness

/imˈpasivnəs//ɪmˈpæsɪvnəs/