Resignation is a related term of imperturbability.
As nouns the difference between resignation and imperturbability
is that resignation is resignation (state of uncomplaining frustration) while imperturbability is a state of calm, unruffled self-assurance; aplomb, composure.
resignation
English
Noun
(
en noun)
the act of resigning
a written or oral declaration that one resigns
state of uncomplaining, utter frustration
Anagrams
*
imperturbability
English
Noun
(-)
A state of calm, unruffled self-assurance; aplomb, composure.
Related terms
* imperturbable