volunteer - OCD definition
volunteer
• noun 1 a person who freely offers to do something. 2 a person who works for an organization without being paid. 3 a person who freely enrols for military service rather than being conscripted.
• verb 1 freely offer to do something. 2 say or suggest something without being asked. 3 freely enrol for military service rather than being conscripted. 4 commit (someone) to an undertaking.
— ORIGIN from French volontaire ‘voluntary’.