reserve

To keep back, as for future use or for a special purpose.

To set or cause to be set apart for a particular person or use: synonym: book.

To keep or secure for oneself; retain: synonym: keep.

Something kept back or saved for future use or a special purpose.

An amount of capital that is not invested or otherwise used in order to meet probable demands, such as withdrawals by bank depositors or claims on insurance policies.

Lack of enthusiasm, as from a misgiving or doubt.

Self-restraint in expression or bearing; reticence or coolness.

A reservation of public land.