English adjective: imperturbable | |||
1. | imperturbable not easily perturbed or excited or upset; marked by extreme calm and composure | ||
Samples | Hitherto imperturbable, he now showed signs of alarm. An imperturbable self-possession. Unflappable in a crisis. | ||
Synonyms | unflappable | ||
Similar | composed | ||
Antonyms | discomposed | ||