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Definition of unflappable

unflappable

/ʌnˈflæp.ə.bəl/
un · flap · pa · ble
Adverb:unflappably
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unflappable Lexical Profile

unflappable Game Scores & Validity

• adjective

1

Having or showing calmness, composure, and self-control in the face of crisis, stress, or unexpected disruption; not easily agitated or panicked.

Example

"The air traffic controller remained completely unflappable even as a severe thunderstorm forced several planes to divert at once."

Synonyms
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Antonyms
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• Rhymes for unflappable

• Nearby Words

unfixed
unflagging
unflaggingly
unflappable
unflappably
unflashy
unflattering

Word Origin & Etymology

Coined in mid-20th-century British English from the colloquial noun 'flap' (a state of panic or nervous agitation), originally popularized as Royal Air Force slang during World War II.

Cite this Entry

Wordmom. (2026). Definition of Unflappable. In Wordmom Dictionary. Retrieved Nov 4, 2026, from https://wordmom.com/dictionary/unflappable
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