Life-giving Definition

līfgiviŋ
adjective
That gives or can give life.
Webster's New World
Strengthening; refreshing; inspiring.
Webster's New World
Creating or engendering life; being a source of life.
Wiktionary

Describing that which causes or preserves life, often for that which is essential to survival.

Without lifegiving water, a person will die in days.
Wiktionary
Synonyms: