reserved

adj 1: set aside for the use of a particular person or party [ant:

{unreserved}]

2: marked by self-restraint and reticence; "was habitually

reserved in speech, withholding her opinion"-Victoria

Sackville-West [ant: {unreserved}]

3: cool and formal in manner [syn: {restrained}, {reticent}, {unemotional}]