unflappable
UK: ʌnˈflæpəbl̩ | US: ʌnˈflæpəbl̩
adj. remaining calm and composed, especially under stress or criticism
The word "unflappable" combines the negative prefix "un-" (Old English "un-," meaning "not") with "flap" (likely imitative of the sound of agitation, later metaphorically extended to mean "disturbance" or "panic") and the suffix "-able" (Latin "-abilis," indicating capability). Originally used in the mid-20th century, it humorously likens emotional composure to an object that cannot be "flapped" or disturbed by external forces. The term gained popularity in political contexts to describe leaders who remained steady under pressure.
Despite the chaotic debate, the senator remained unflappable.
Her unflappable demeanor made her an excellent emergency room doctor.
The CEO's unflappable confidence reassured investors during the crisis.
Even when criticized, he responded with unflappable grace.
Teachers need to be unflappable when handling rowdy classrooms.