unflappable

[ uhn-flap-uh-buh l ]
/ ʌnˈflæp ə bəl /

adjective

not easily upset or confused, especially in a crisis; imperturbable.

Origin of unflappable

First recorded in 1950–55; un-1 + flap + -able

OTHER WORDS FROM unflappable

un·flap·pa·bil·i·ty, noun un·flap·pa·bly, adverb

British Dictionary definitions for unflappability

unflappable
/ (ʌnˈflæpəbəl) /

adjective

informal hard to upset; imperturbable; calm; composed

Derived forms of unflappable

unflappability or unflappableness, noun unflappably, adverb