adjective
1.
Synonyms: undemonstrative , aseptic, restrained, retiring, shrinking, unaffable, unexpansive
Antonyms: outgiving
2.
Synonyms: indifferent 2, aloof, casual, detached, disinterested, incurious, remote, unconcerned, uncurious, uninterested
3.
Synonyms: unsociable , aloof, cool, distant, insociable, offish, reserved, solitary, standoffish, uncompanionable
Antonyms: outgoing