inclined to silence; reserved in speech; reluctant to join in conversation.

dour, stern, and silent in expression and manner.

adjective

communicative , fluent , talkative , wordy

adjective

aloof , antisocial , brooding , clammed up , close , close-mouthed , cold , curt , distant , dour , dried-up , dumb , laconic , mum , mute , quiet , reserved , reticent , sententious , silent , sparing , speechless , tight-lipped * , unexpressive , unforthcoming , withdrawn , incommunicable , incommunicative , tightlipped , uncommunicable , uncommunicative , closemouthed , unvocal