·vi To become sweet.
II. Sweeten ·adj To soften to the eye; to make delicate.
III. Sweeten ·adj To make sweet to the taste; as, to sweeten tea.
IV. Sweeten ·adj To make warm and fertile;
— opposed to sour; as, to dry and sweeten soils.
V. Sweeten ·adj To restore to purity; to free from taint; as, to sweeten water, butter, or meat.
VI. Sweeten ·adj To make mild or kind; to Soften; as, to sweeten the temper.
VII. Sweeten ·adj To make pleasing or grateful to the mind or feelings; as, to sweeten life; to sweeten friendship.
VIII. Sweeten ·adj To make less painful or laborious; to Relieve; as, to sweeten the cares of life.
IX. Sweeten ·adj To make pure and salubrious by destroying noxious matter; as, to sweeten rooms or apartments that have been infected; to sweeten the air.