not inclined to society or companionship; "an unsociable nature...shy and reserved"; "generally unsociable except with intimate friends"; "unsociable behavior"; "an unsociable neighborhood"
harshly uninviting or formidable in manner or appearance; "a dour, self-sacrificing life"; "a forbidding scowl"; "a grim man loving duty more than humanity"; "undoubtedly the grimmest part of him was his iron claw"- J.M.Barrie
disposed to avoid notice; "they considered themselves a tough outfit and weren't bashful about letting anybody know it"; (`blate' is a Scottish term for bashful)
self-consciously timid; "I never laughed, being bashful; lowering my head, I looked at the wall"- Ezra Pound