Almost exclusively used in the set phrase 肌身離さず, meaning 'always on one's person' or 'never parting with something'. The word itself is not freely used as a standalone noun.
See also: 肌身離さず
He always carries the charm on his person.
This ring is a memento of my mother, and I never take it off.
close to one's person; next to the skin
Standard kanji spelling; used in the common phrase 肌身離さず.
Rarely used kanji form.
Compound of 肌 (はだ, 'skin') and 身 (み, 'body'), literally 'skin and body', emphasizing closeness to one's person.