unwillingness
n.the feeling of not wanting to do something. It is the opposite of being ready or happy to help.
n.the state of being reluctant or hesitant to perform an action. Often implies a lack of cooperation or a deliberate choice to refuse.
“Her unwillingness to share the secret caused many problems.”
“The project failed because of the team's unwillingness to work together on weekends.”
“The diplomat noted that the government's unwillingness to compromise on border security would likely lead to a breakdown in the peace negotiations.”
Typically followed by the infinitive 'to' and a verb.
“The effect is specific: It is envy itself—the unwillingness to let others have more—that is reinforced when we vote together.”
From unwilling + -ness.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.