Sweet·en v. t. [imp. & p. p. Sweetened p. pr. & vb. n. Sweetening.]
1. To make sweet to the taste; as, to sweeten tea.
2. To make pleasing or grateful to the mind or feelings; as, to sweeten life; to sweeten friendship.
3. To make mild or kind; to soften; as, to sweeten the temper.
4. To make less painful or laborious; to relieve; as, to sweeten the cares of life.
And sweeten every secret tear. --Keble.
5. To soften to the eye; to make delicate.
Correggio has made his memory immortal by the strength he has given to his figures, and by sweetening his lights and shadows, and melting them into each other. --Dryden.
6. To make pure and salubrious by destroying noxious matter; as, to sweeten rooms or apartments that have been infected; to sweeten the air.
7. To make warm and fertile; -- opposed to sour; as, to dry and sweeten soils.
8. To restore to purity; to free from taint; as, to sweeten water, butter, or meat.
adj : with sweetening added [syn: sugared, sweet]