ill in WordNet English dictionary

1. an often persistent bodily disorder or disease; a cause for complaining
   ailment  complaint  ill 
   

1. (`ill' is often used as a combining form) in a poor or improper or unsatisfactory manner; not well
   "he was ill prepared"; "it ill befits a man to betray old friends"; "the car runs badly"; "he performed badly on the exam"; "the team played poorly"; "ill-fitting clothes"; "an ill-conceived plan"
   ill  badly  poorly  ill  badly  poorly 
   
2. unfavorably or with disapproval
   "tried not to speak ill of the dead"; "thought badly of him for his lack of concern"
   ill  badly  ill  badly 
   
3. with difficulty or inconvenience; scarcely or hardly
   "we can ill afford to buy a new car just now"
   ill  ill 
   

1. affected by an impairment of normal physical or mental function
   "ill from the monotony of his suffering"
   ill  sick 
   
2. distressing
   "ill manners"; "of ill repute"
   ill 
   
3. resulting in suffering or adversity
   "ill effects"; "it's an ill wind that blows no good"
   ill 
   
4. indicating hostility or enmity
   "you certainly did me an ill turn"; "ill feelings"; "ill will"
   ill 
   
5. presaging ill fortune
   "ill omens"; "ill predictions"; "my words with inauspicious thunderings shook heaven"- P.B.Shelley; "a dead and ominous silence prevailed"; "a by-election at a time highly unpropitious for the Government"
   ill  inauspicious  ominous