reserve

> reserve
(verb)
hold, husband, keep, retain, store.

> reserve
(adjective)
alternate, auxiliary, spare, substitute.

> reserve
(noun)
reservation.
aloofness, backwardness, closeness, coldness, concealment, constraint, suppression, reservedness, retention, restraint, reticence, uncommunicativeness, unresponsiveness.
coyness, demureness, modesty, shyness, taciturnity.
park, reservation, sanctuary.