the.com/conserve
To keep a thing intact by refusing to let the world spend it.
means To protect something from loss, waste, or change by carefully preserving or using less of it.
from From Latin conservare, to keep watch over: com- (thoroughly) plus servare (to guard, to save), the same vigilant root behind preserve and observe.
Sweet cousinA conserve is also a chunky jam of fruit.
Physics oathEnergy is conserved, never created or destroyed.
Sister wordConservative literally means inclined to conserve things.