unflappability means the state of being unflappable. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Why “unflappability” is a great word
UNFLAPPABILITY — [Noun] The quality of remaining calm and composed, especially in a crisis. From unflappable (meaning "not easily upset") + the noun-forming suffix -ity. The adjective 'unflappable' is formed from un- ("not") + flap (in the colloquial sense "to become agitated or upset") + -able ("capable of"). First attested in 1959. Unlike "imperturbability," which implies a profound, stoic detachment, or "nonchalance," which suggests a casual indifference, unflappability is the pragmatic maintenance of cool-headed competence under fire. It is the surgeon’s steady hand when a monitor alarms, the pilot’s measured voice reciting a checklist through turbulence, and the diplomat’s unbroken stride through a shouting crowd—a quiet insistence that order persists as the definitive reply to chaos.
noun
- The state of being unflappable.“Longevity ran in the family; Mrs. Calment's mother lived until she was 86 and her father until he was 93. But Mr. Robine said her great strength was her unflappability. […]“She once said, ‘If you can't do anything about it, don't worry about it.’””