Synonyms of unflappable in English:

unflappable


See US English definition of unflappable

See UK English definition of unflappable

See Spanish definition of imperturbable

adjective

1‘I prided myself on being unflappable even in the most chaotic circumstances’

SYNONYMS
imperturbable, unexcitable, cool, calm, collected, cool, calm, and collected, controlled, self-controlled, self-possessed, cool-headed, level-headed, relaxed, insouciant, serene, stoical, phlegmatic, unmoved
laid-back, together
ANTONYMS

excitable