antisocial
adj.adj. not wanting to spend time with other people or behaving in a way that is annoying or harmful to others.
adj. unwilling or unable to associate in a normal or friendly way with other people; also describes behavior that violates social norms or harms the community.
He feels a bit antisocial today and wants to stay home.
The local council introduced new rules to stop antisocial behavior like loud music and littering in the park.
While some view his preference for solitude as merely introverted, others argue that his refusal to participate in any community events is intentionally antisocial.
From anti- + social.
Often used predicatively after linking verbs like 'be', 'feel', or 'become'; can also be used attributively to describe specific behaviors.