unfreiwilliger
Unfreiwilliger is a German noun derived from the adjective unfreiwillig, meaning involuntary or not of one’s own free will. As a noun it denotes a person who acts or participates not out of personal volition, but due to coercion, pressure, deception, or lack of consent. In Everyday German the term is relatively uncommon; more frequent is to describe the person as someone who “handelt nicht freiwillig” or to use specific phrases such as unfreiwilliger Zeuge or unfreiwilliger Teilnehmer in particular contexts.
Etymology and forms: The word combines un- (not) with freiwillig (voluntary). The masculine singular noun form
Usage and nuance: Unfreiwilliger emphasizes lack of voluntary participation rather than moral judgment about the person.
See also: freiwillig, unfreiwillig (adjective), Zwang, Einwilligung, Freiwilligkeit, Zeuge.
Note: The term is comparatively rare in everyday speech and more typical in formal or analytical writing.