The breath of life; that which imparts or sustains life; a vivifying principle or agency.(noun)
The Century Dictionary (Public Domain)
Use "life-breath" in a sentence
"A place where chocolate-dipped demon mummies can never, ever reach you - much less wrap you in their fudgy arms and squeeze the life-breath out of you."
"Did not the One make [all], so that all remaining life-breath is His?"
"Singing and public acclaim were her life-breath and inspiration as an artist."