adjective Etymology: 1un- + 1flap (state of excitement) + -able Date: 1954 marked by assurance and self-control, unflappability noun unflappably adverb
UNFLAPPABLE
Meaning of UNFLAPPABLE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012