The Collaborative International Dictionary of English v.0.48:
umbrageous \um*bra"geous\ ([u^]m*br[=a]"j[u^]s; 277), a. [Cf. F.
ombrageux shy, skittish, suspicious, in OF. also, shady. See
Umbrage.]
1. Forming or affording a shade; shady; shaded; as,
umbrageous trees or foliage.
[1913 Webster]
Umbrageous grots and caves
Of cool recess, o'er which the mantling vine
Lays forth her purple grape. --Milton.
[1913 Webster]
2. Not easily perceived, as if from being darkened or shaded;
obscure. [Obs.] --Sir H. Wotton.
[1913 Webster]
3. Feeling jealousy or umbrage; taking, or disposed to take,
umbrage; suspicious. [Obs.] --Bp. Warburton. --
Um*bra"geous*ly, adv. -- Um*bra"geous*ness, n.
[1913 Webster]