hesitation in WordNet English dictionary

1. a certain degree of unwillingness
   "a reluctance to commit himself"; "his hesitancy revealed his basic indisposition"; "after some hesitation he agreed"
   reluctance  hesitancy  hesitation  disinclination  indisposition 
   
2. the act of pausing uncertainly
   "there was a hesitation in his speech"
   hesitation  waver  falter  faltering 
   
3. indecision in speech or action
   hesitation  vacillation  wavering