Conserve

[verb kuh n-surv; noun kon-surv, kuh n-surv] /verb kənˈsɜrv; noun ˈkɒn sɜrv, kənˈsɜrv/

verb (used with object), conserved, conserving.
1.
to prevent injury, decay, waste, or loss of:
Conserve your strength for the race.
2.
to use or manage (natural resources) wisely; preserve; save:
Conserve the woodlands.
3.
Physics, Chemistry. to hold (a property) constant during an interaction or process:
the interaction conserved linear momentum.
4.
to preserve (fruit) by cooking with sugar or syrup.
noun
5.
Often, conserves. a mixture of several fruits cooked to jamlike consistency with sugar and often garnished with nuts and raisins.
verb (transitive) (kənˈsɜːv)
1.
to keep or protect from harm, decay, loss, etc
2.
to preserve (a foodstuff, esp fruit) with sugar
noun (ˈkɒnsɜːv; kənˈsɜːv)
3.
a preparation of fruit in sugar, similar to jam but usually containing whole pieces of fruit
v.

late 14c., from Old French conserver (9c.), from Latin conservare “to keep, preserve, keep intact, guard,” from com-, intensive prefix (see com-), + servare “keep watch, maintain” (see observe). Related: Conserved; conserving. As a noun (often conserves) from late 14c.