nephesh (Hebrew #5315)
properly, a breathing creature, i.e. animal of (abstractly) vitality; used very widely in a literal, accommodated or figurative sense (bodily or mental)
KJV usage: any, appetite, beast, body, breath, creature, X dead(-ly), desire, X (dis-)contented, X fish, ghost, + greedy, he, heart(-y), (hath, X jeopardy of) life (X in jeopardy), lust, man, me, mind, mortally, one, own, person, pleasure, (her-, him-, my-, thy-)self, them (your)-selves, + slay, soul, + tablet, they, thing, (X she) will, X would have it.
Pronounce: neh'-fesh
ratsach (Hebrew #7523)
properly, to dash in pieces, i.e. kill (a human being), especially to murder
KJV usage: put to death, kill, (man-)slay(-er), murder(-er).
Pronounce: raw-tsakh'
Origin: a primitive root