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Adjective: life-sustaining
  1. Performing an essential function in the living body
    "life-sustaining organs";
    - vital

See also: essential

Nearest

lifesaver
lifesaving
lifesize
life-size
life-sized
lifespan
lifestyle
life-style
life-support
life-support system
life-sustaining
life-threatening
lifetime
life-time
lifework
LIFO
lift
lift bridge
lift capacity
lift off
lift out