unflappable

== English == === Etymology === From un- +‎ flap (“to upset, stir”) +‎ -able. === Pronunciation === IPA(key): /ʌnˈflæpəbəl/ === Adjective === unflappable (comparative more unflappable, superlative most unflappable) Remaining composed and level-headed at all times; impossible to fluster; not becoming frustrated or irritated easily. [from 1954] Synonyms: collected, cool, even-keeled, imperturbable; see also Thesaurus:apathetic Antonym: flappable ==== Related terms ==== ==== Translations ====