umbrageous (adj) – providing, creating, or having shade; shady; irritable or quick to take offense
BREAKDOWN: UMBR- (shade) + -AGE (state of being) + -OUS (inclined to)
This word is built on the root UMBR-, which means shade or shadow.
Common UMBR- words include sombrero and umbrella.
More esoteric UMBR- words include abumbral obumbrate, umbral, and umbrose.