W: (adj) unhappy [Opposed to: happy] (experiencing or marked by or causing sadness or sorrow or discontent) "unhappy over her departure"; "unhappy with her raise"; "after the argument they lapsed into an unhappy silence"; "had an unhappy time at school"; "the unhappy (or sad) news"; "he looks so sad"
W: (adj) unfortunate [Indirect via fortunate] (not favored by fortune; marked or accompanied by or resulting in ill fortune) "an unfortunate turn of events"; "an unfortunate decision"; "unfortunate investments"; "an unfortunate night for all concerned"
S: (adj) glad, happy (eagerly disposed to act or to be of service) "glad to help"