unflappable

adjective

un·​flap·​pa·​ble ˌən-ˈfla-pə-bəl 

: marked by assurance and self-control

unflappability

ˌən-ˌfla-pə-ˈbi-lə-tē 

noun

unflappably

ˌən-ˈfla-pə-blē 

adverb

Synonyms

• imperturbable
• nerveless
• unshakable

Examples of unflappable in a Sentence

He has a reputation for being unflappable.

the unflappable teacher never even blinked when the wall map came crashing down

Recent Examples on the Web

If there is a Hall of Fame trainer who wouldn’t flinch taking on Disruptor and Ortiz, the unflappable South Dakotan, William I. Mott, is prime among them. —Guy Martin, Forbes.com, 26 Mar. 2025

The show was so popular that a young Jim Carrey did an impression of the famously unflappable Woolery on In Living Color. —Victoria Edel, People.com, 24 Nov. 2024

Tracing Josiah’s trajectory from lumberjack to shipyard riveter to ambitious serviceman, Wang offers a protagonist of unflappable morality and decency. —The New Yorker, 10 Feb. 2025

Floria is a portrait of unflappable repression, the sort of level of stress that numbs the muscles in the face to be nothing other than blank. —Adam Solomons, IndieWire, 17 Feb. 2025

Word History

Etymology

un- entry 1 + flap entry 1 (state of excitement) + -able

First Known Use

1954, in the meaning defined above

Kids Definition

unflappable

adjective

un·​flap·​pa·​ble ˌən-ˈflap-ə-bəl 

: not easily upset or panicked : unusually calm