imperturbable

[ im-per-tur-buh-buhl ]
/ ˌɪm pərˈtɜr bə bəl /

adjective

incapable of being upset or agitated; not easily excited; calm: imperturbable composure.

Origin of imperturbable

1490–1500; < Late Latin imperturbābilis. See im-2, perturbable

OTHER WORDS FROM imperturbable

im·per·turb·a·bil·i·ty, im·per·turb·a·ble·ness, nounim·per·turb·a·bly, adverb
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Examples from the Web for imperturbability

British Dictionary definitions for imperturbability

imperturbable
/ (ˌɪmpɜːˈtɜːbəbəl) /

adjective

not easily perturbed; calm; unruffled

Derived forms of imperturbable

imperturbability or imperturbableness, nounimperturbably, adverbimperturbation (ˌɪmpɜːtɜːˈbeɪʃən), noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012