antisocial

US /ˌæn.t̬iˈsoʊ.ʃəl/
UK /ˌæn.t̬iˈsoʊ.ʃəl/
"antisocial" picture
1.

not wanting to spend time with other people

:
He's been very antisocial lately, refusing all invitations.
Some people become antisocial when they are stressed.
2.

harmful to society; contrary to the laws and customs of society

:
Drug dealing is an antisocial activity.
The government is trying to reduce antisocial behavior in public spaces.