1) Aversation 2) Disinclination 3) Disposition 4) Dragging your feet 5) Indifference 6) Indisposedness 7) Indisposition 8) Lack of enthusiasm 9) Nolition 10) Nolleity 11) Reluctance 12) Renitence 13) Renitency 14) Temperament 15) The trait of being unwilling 1) Difficulty 2) Disinclination 3) Indisposition 4) Reluctance 
[n] - the trait of being unwilling
involuntariness noun the trait of being unwilling; `his unwillingness to cooperate vetoed every proposal I made`; `in spite of our warnings he plowed ahead with the involuntariness of an automaton`