unhappy in WordNet English dictionary

1. generalized feeling of distress
   dysphoric  distressed  unhappy 
   
2. marked by or producing unhappiness
   "infelicitous circumstances"; "unhappy caravans, straggling afoot through swamps and canebrakes"- American Guide Series
   infelicitous  unhappy 
   
3. 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"
   unhappy 
   
4. causing discomfort
   "the unhappy truth"
   unhappy