to prevent injury, decay, waste, or loss of

Conserve your strength for the race.

to use or manage (natural resources) wisely; preserve; save

Conserve the woodlands.

Physics, Chemistry . to hold (a property) constant during an interaction or process

the interaction conserved linear momentum.

to preserve (fruit) by cooking with sugar or syrup.

Often, conserves. a mixture of several fruits cooked to jamlike consistency with sugar and often garnished with nuts and raisins.

verb

destroy , neglect , spend , squander , use , waste

verb

cut back , cut down on , go easy on , hoard , keep , maintain , nurse , preserve , safeguard , scrimp , skimp , sock away , squirrel , squirrel away * , stash , steward , store up , support , sustain , take care of , use sparingly , husband , save , spare , can , put up , guard , protect