Offish (adjective)

Standoffish, aloof, or reserved in manner; not warm or friendly.

Origin:

Early 19th century, from off (a) + -ish.

Examples:

1. The party guest was offish and didn't talk to anyone.
2. The employee was offish and didn't interact much with the other co-workers.
3. The new student was offish and didn't participate in the class discussions.
4. The person was offish and didn't make an effort to get to know the others at the party.
5. The host was offish and didn't make guests feel welcome.