a guard (the man, the post or the prison); a deposit (figuratively); also (as observed) a usage (abstractly), or an example (concretely)

Heart, mind, will. Leb. The centre of human personality. Guard your heart above all else for everything you do flows from it.

a going forth, i.e. (the act) an egress, or (the place) an exit; hence, a source or product; specifically, dawn, the rising of the sun (the East), exportation, utterance, a gate, a fountain, a mine, a meadow (as producing grass)

Life, living. Chay. The quality of being alive. The same root as Chayim, life in its fullness. God breathed chay into Adam's nostrils and he became a living soul.

to guard, in a good sense (to protect, maintain, obey, etc.) or a bad one (to conceal, etc.)

properly, a part of; hence (prepositionally), from or out of in many senses

(only in plural collective) exit, i.e. (geographical) boundary, or (figuratively) deliverance, (actively) source