Saturation
the act of saturating, penetrating, or impregnating completely; the state of being saturated. In chemistry, that point at which a substance ceases to have the power of dissolving or combining with another.
SATURDAY (from Anglo-Saxon Sæterdæg, Sæterndæg-Sæter, Sætern, for Saturn, and dæg, a day-the day presided over by the planet Saturn), the seventh or last day of the week; the day of the Jewish Sabbath.