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
See all Synonyms & Antonyms 
Example Sentences
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 That quartet was there in 1955, when the Brooklyn Dodgers won their only world championship, moving the normally-unflappable Scully to the brink of tears. 
Dan Schlossberg, Forbes, 3 Aug. 2022 The seemingly unflappable Raiff is also not letting that get in his head. Clark Hodgin, Los Angeles Times, 29 June 2022 At the end of his tether and almost constantly raging against the impossibility of living with his infuriating, foul-mouthed father, Michael hires Lillian (wonderfully unflappable Henry), a hospice nurse from St. Vincent and the Grenadines. David Benedict, Variety, 26 June 2022 Those around him often remark about his ability to remain unflappable and unfazed. San Diego Union-Tribune, 11 Aug. 2022 More often than not, their primary purpose is to elicit emotion—to puncture the illusion of the unflappable, stoic athlete. Martin Fritz Huber, Outside Online, 6 July 2022 Mitchell looked unflappable, taking command of her heat on the back straight of the last lap and holding it to the finish. Ken Goe For The Oregonian/oregonlive, oregonlive, 9 June 2022 The effect is stalwart, unflappable, a more senior version of Ms. Hutchinson’s look. New York Times, 30 June 2022 And though Watts was in some way the soul of the Stones – unflappable, immaculately dressed and always a bit behind the beat by exactly the right amount – Steve Jordan, who began filling in for him last year, anchored the band with style. Rob Levine, Billboard, 6 June 2022 See More
Dan Schlossberg, Forbes, 3 Aug. 2022 The seemingly unflappable Raiff is also not letting that get in his head. Clark Hodgin, Los Angeles Times, 29 June 2022 At the end of his tether and almost constantly raging against the impossibility of living with his infuriating, foul-mouthed father, Michael hires Lillian (wonderfully unflappable Henry), a hospice nurse from St. Vincent and the Grenadines. David Benedict, Variety, 26 June 2022 Those around him often remark about his ability to remain unflappable and unfazed. San Diego Union-Tribune, 11 Aug. 2022 More often than not, their primary purpose is to elicit emotion—to puncture the illusion of the unflappable, stoic athlete. Martin Fritz Huber, Outside Online, 6 July 2022 Mitchell looked unflappable, taking command of her heat on the back straight of the last lap and holding it to the finish. Ken Goe For The Oregonian/oregonlive, oregonlive, 9 June 2022 The effect is stalwart, unflappable, a more senior version of Ms. Hutchinson’s look. New York Times, 30 June 2022 And though Watts was in some way the soul of the Stones – unflappable, immaculately dressed and always a bit behind the beat by exactly the right amount – Steve Jordan, who began filling in for him last year, anchored the band with style. Rob Levine, Billboard, 6 June 2022 See More Word History
Etymology
un- entry 1 + flap entry 1 (state of excitement) + -able
First Known Use
1954, in the meaning defined above
unflappable
adjective
as in nonchalant
not easily panicked or upset the unflappable teacher never even blinked when the wall map came crashing down Synonyms & Similar Words
Relevance
- nonchalant
- calm
- imperturbable
- serene
- unshakable
- composed
- unruffled
- nerveless
- cool
- unperturbed
- collected
- unshaken
- unworried
- steely
- placid
- tranquil
- untroubled
- undisturbed
- icy
- coolheaded
- self-possessed
- self-composed
- self-collected
Antonyms & Near Antonyms
- panicky
- perturbable
- nervous
- shakable
- uptight
- anxious
- shakeable
- troubled
- shaky
- nervy
- edgy
- perturbed
- uneasy
- tense
- upset
- jittery
- jumpy
- dithery
- worried
- het up
- aflutter
- hung up