Chapter Morphogeny to Mortify of M by Webster's Dictionary (1913 Edition)

1. To lose vitality and organic structure, as flesh of a living body; to gangrene.

2. To practice penance from religious motives; to deaden desires by religious discipline.

This makes him . . . give alms of all that he hath, watch, fast, and mortify.

Law.

3. To be subdued; to decay, as appetites, desires, etc.