6 letters · 9 points in Scrabble
adjective having a difficult and contrary disposition; - Dorothy Sayers
originA contracted or dialectal pronunciation of ordinary. Sense 3 (“ordinary, commonplace”) was the earliest sense; the meaning of the word then shifted to “inferior, plain-looking, unpleasant”—presumably due to ordinariness—and finally to sense 1 (“disagreeable, stubborn, and troublesome to deal with”).
Etymology from Wiktionary, CC BY-SA 3.0