cynic — a person who believes that people are motivated purely by self-interest rather than acting for honorable or unselfish reasons

a person with crossed arms and a scowling expression watches volunteers distributing free food to families. The cynic points dismissively at the volunteers while shaking their head in disbelief. When a volunteer smiles warmly while handing out meals, the cynic rolls their eyes and makes a sneering gesture. The cynic leans toward another bystander, clearly suggesting the volunteers have selfish hidden motives. Happy families receiving help and cheerful volunteers continue their good work around them. Other community members look puzzled by the cynic's negative attitude toward the charitable scene. a person who believes that people are motivated purely by self-interest rather than acting for honorable or unselfish reasons