English word conserve comes from Latin com-, Latin servo, and later Old French conserver (To keep (e.g. a promise).)

Detailed word origin of conserve

Dictionary entry	Language	Definition
com-	Latin (lat)
servo	Latin (lat)	(figurative) I permit, allow. I maintain, keep. I preserve, store, keep. I protect, keep, guard, watch over. I save.
conservare	Latin (lat)
conserver	Old French (fro)	To keep (e.g. a promise).
conserve	English (eng)	(physics, chemistry, intransitive) To remain unchanged during a process. (transitive) To protect an environment.. (transitive) To save for later use, sometimes by the use of a preservative. (obsolete) A conservatory.. (obsolete) A medicinal confection made of freshly gathered vegetable substances mixed with finely powdered refined sugar.. A jam or thick syrup made from fruit.. Wilderness [...]

Words with the same origin as conserve