If a product contains bleach (peroxide), it will whiten your teeth. But not all treatments are created equal. It's the concentration or percent of hydrogen peroxide a teeth-whitening system contains and the amount of time it's in contact with your teeth that determines its effectiveness.
Definition of fecund - producing or capable of producing an abundance of offspring or new growth; highly fertile Definition of fecund - producing or capable of producing an abundance of offspring or new growth; highly fertile
Definition of endow. 1  transitive verb. 2  1 : to furnish with an income; especially : to make a grant of money providing for the continuing support or maintenance of endow a hospital. 3  2 : to furnish with a dower.  3 : to provide with something freely or naturally endowed with a good sense of humor.