English word reserve comes from Old French reserver

Detailed word origin of reserve

Dictionary entry	Language	Definition
reserver	Old French (fro)
reserve	English (eng)	(obsolete) To make an exception of; to except.. To book in advance; to make a reservation.. To keep back; to retain.. To keep in store for future or special use. (Canada) A tract of land set apart for the use of an Aboriginal group; Indian reserve (compare US reservation.). (behaviour) Restriction.. (calico printing) A resist.. (card games) A group or pile of cards dealt out at the beginning [...]