imperturbable

/ˌɪmpəˈtɜːbəbəl/adjective

Staying calm no matter what happens; impossible to fluster.

Example sentence

“The pilot remained imperturbable during the turbulence.”

A memory aid: someone who cannot be perturbed. Praise for people who stay calm under pressure.

Featured as word of the day on January 28, 2026.

Related words

impetuousActing suddenly on impulse and with force, without thinking things through.imperceptibleToo slight or small to be noticed or sensed.implementAn object or tool used to carry out a particular kind of work.imperativeAbsolutely necessary; of the greatest importance.implicitUnderstood as part of something without being directly stated.impedeTo slow something down or make it harder for it to move forward.