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Definition of Imperturbableness
1. Noun. Calm and unruffled self-assurance. "He performed with all the coolness of a veteran"
Exact synonyms: Coolness, Imperturbability
Generic synonyms: Calmness
Derivative terms: Cool, Imperturbable, Imperturbable
Generic synonyms: Calmness
Derivative terms: Cool, Imperturbable, Imperturbable