How do you spell Lather

Available Definitions:
1)  n. - Foam or froth made by soap moistened with water.
2)  n. - Foam from profuse sweating, as of a horse.
3)  n. - To spread over with lather; as, to lather the face.
4)  v. i. - To form lather, or a froth like lather; to accumulate foam from profuse sweating, as a horse.
5)  v. t. - To beat severely with a thong, strap, or the like; to flog.