unflappable

adjective

un·​flap·​pa·​ble ˌən-ˈfla-pə-bəl 

: marked by assurance and self-control

has a reputation for being unflappable even in the worst situations

unflappability

ˌən-ˌfla-pə-ˈbi-lə-tē 

noun

unflappably

ˌən-ˈfla-pə-blē 

adverb

Synonyms of unflappable

• nonchalant
• calm
• imperturbable
• serene
• unshakable
• composed
• nerveless

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

Behind them, manning the decks, was Margo XS, unflappable in her wraparound shades. — Walden Green, Pitchfork, 30 July 2026

Why The Executive Playbook Has To Change The typical model for high-achieving leaders is to out-suffer everyone else in the room, appear unflappable, stay silent on struggles, and be the first one in and last one out. — Julian Hayes Ii, Forbes.com, 25 July 2026

One night at the tables, Pughsley met a man named Tommy Hunt, who seemed unflappable no matter the size of the pot. — Keith O’Brien, New Yorker, 25 June 2026

The service Sleek, steady, unflappable. — Condé Nast, Condé Nast Traveler, 24 June 2026

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