adjective
1.
Synonyms: silent 3, close, close-lipped, closemouthed, close-tongued, reserved, reticent, taciturn, tight-lipped, tight-mouthed
Antonyms: communicative
2.
Synonyms: unsociable , aloof, distant, insociable, offish, reserved, standoffish, unapproachable, unbending, withdrawn