difficulty in WordNet English dictionary

1. the quality of being difficult
   "they agreed about the difficulty of the climb"
   difficulty  difficultness 
   
2. an effort that is inconvenient
   "I went to a lot of trouble"; "he won without any trouble"; "had difficulty walking"; "finished the test only with great difficulty"
   trouble  difficulty 
   
3. a factor causing trouble in achieving a positive result or tending to produce a negative result
   "serious difficulties were encountered in obtaining a pure reagent"
   difficulty 
   
4. a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome
   "grappling with financial difficulties"
   difficulty