say it: uhn-FLAP-uh-buhl
unflappable is an adjective meaning "not easily perturbed or excited or upset; marked by extreme calm and composure". It carries one recorded sense.
not easily perturbed or excited or upset; marked by extreme calm and composure
“hitherto imperturbable, he now showed signs of alarm”
“an imperturbable self-possession”
“unflappable in a crisis”
Definitions, synonyms and semantic relations for unflappable come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.