unflappable.

Remaining outwardly composed despite pressure, surprise, or difficulty.

Use it for

Words that belong together

• an unflappable manner
• an unflappable negotiator

On the page

The operator remained unflappable while the alarms competed for attention.

Her unflappable manner returned only after she understood which door had locked.

Usage notes

Primary category: psychological / character. Forms: Comparative more unflappable; superlative most unflappable where gradation is meaningful. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.