Mortify
is,

(from the Latin ...'to make dead');

To subdue; to restrain; to bring into subjection; as one's passions or bodily appetites which are
irregular, excessive,
immoderate, or
disorderly.
For if ye live after the flesh,
ye shall die:
but if ye through the Spirit
do mortify the deeds of the body,
ye shall live.

Romans 8:13