reserved

Designated as unavailable except for a certain purpose or user; kept in reserve.

Given to or marked by self-restraint and reticence.

Kept for another or future use; retained; kept back.

Showing reserve in behavior; backward in communicating one’s thoughts; not open, free, or frank; distant; cold; shy; coy.

Retired; secluded.

In decorative art, left of the color of the background, as when another color is worked upon the ground to form a new ground, the pattern being left of the first color.

Synonyms Excepted, withheld.

Restrained, cautious, uncommunicative, unsocial, unsociable, taciturn.

Kept for future or special use, or for an exigency.

Restrained from freedom in words or actions; backward, or cautious, in communicating one’s thoughts and feelings; not free or frank.