Necessary for preserving life or essential bodily function.
Reach for it when describing material support whose interruption would threaten survival, not merely comfort
Solar batteries kept life-sustaining equipment running through the outage.
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| warm | |
| professional |
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| formal | |
| literary |
everyday
Fits when the item cannot safely be omitted
Careful Essential applies to any important purpose and does not identify life as the stake.
everyday
Fits when something is essential to continued life or success
Careful Vital is broader and often figurative, while life-sustaining makes the survival claim explicit.
warm
Fits when food or care supplies what healthy growth requires
Careful Nourishing suggests positive development rather than minimum survival.
professional
Fits when an intervention prevents an imminent or probable death
Careful Lifesaving describes rescue from danger; ongoing support may instead sustain a stable life.
formal
life-supporting
Fits when conditions or systems enable life to continue
Careful Life-supporting can describe a habitat broadly and may not indicate medical necessity.
literary
sustaining
Fits when continued strength or existence is being supported
Careful Sustaining alone can refer to morale, attention, or institutions.
life-sustaining treatment
The patient discussed life-sustaining treatment with her family and physician.
life-sustaining supplies
Boats delivered life-sustaining supplies after the road washed out.
life-sustaining water
The restored spring provides life-sustaining water through the dry season.
Definitions and examples are written for this site. How words are chosen Updated
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