unflappable

Definition

Remaining composed and level-headed at all times; impossible to fluster; not becoming frustrated or irritated easily.

Etymology

From un- + flap (“to upset, stir”) + -able.

Example Sentences

• "The whole thing looked remarkably like an implacable force meeting an unflappable object."
• "It was for this reason that when Lord Hailsham first described Harold Macmillan as "unflappable'", it became an instant catchword, distancing the incoming Prime Minister from his predecessor"
• "Whereas his predecessor was impetuous, Obama was praised for being contemplative and unflappable. Bush had a gut; Obama had a brain."