Synonyms of unflappable in English:

unflappable


See definition of unflappable

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