unrufflable
/(ˌ)ʌnˈrʌf(ə)ləbl/ /(ˌ)ʌnˈrʌfləbl/(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.
- steer (or take) a middle course
- steersman
- steersmanship
- steer wrestler
- steer wrestling
- steeve
- steez
- steeze
- steezy
- Stefan–Boltzmann law
- Steffens, Lincoln
- steganography
- Stegner, Wallace
- stegosaur
- stegosaurus
- Steichen, Edward
- Steiermark
- Steiger, Rod
- stein
- Steinbeck, John
- steinbock
- steinbok
- Steinbrenner, George
- Steinem, Gloria
- Steiner, Rudolf