Definition of unrufflable in English:

unrufflable

(also unruffleable)

adjective

  • Incapable of being unduly excited, agitated, or disturbed; calm, collected, imperturbable.

Origin

Early 19th century; earliest use found in Farrier & Naturalist. From un- + ruffle + -able.

Pronunciation

unrufflable

/(ˌ)ʌnˈrʌf(ə)ləbl/ /(ˌ)ʌnˈrʌfləbl/