French ''réservoir'' (1510 in Middle French with [[reference]] to a [[lake]], pool, or other [[natural]] or man-made reserve of [[water]]; from mid 16th cent. with reference to a store for other substances. | French ''réservoir'' (1510 in Middle French with [[reference]] to a [[lake]], pool, or other [[natural]] or man-made reserve of [[water]]; from mid 16th cent. with reference to a store for other substances. |