Reticent

a.

1.

Inclined to keep silent; reserved; uncommunicative.

Adj.	1.	reticent - temperamentally disinclined to talk Synonyms: untalkative
	2.	reticent - cool and formal in manner Synonyms: restrained, unemotional, reserved
	3.	reticent - reluctant to draw attention to yourself Synonyms: self-effacing

Olympian, aloof, backward, blank, chilled, chilly, close, close-lipped, close-tongued, closemouthed, cold, constrained, cool, detached, discreet, distant, expressionless, forbidding, frigid, frosty, guarded, icy, impassive, impersonal, inaccessible, introverted, modest, offish, remote, removed, repressed, retiring, shrinking, silent, standoff, standoffish, suppressed, taciturn, tight-lipped, timid, unaffable, unapproachable, uncommunicative, uncongenial, undemonstrative, unexpansive, ungenial, unresponsive