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necessary to maintain life; of the greatest importance

very lively; having the appearance of vigorous life or freshness

organic substances that are essential for nutrition (and life)

full of life and energy; lively

physical or mental vigor; "power of living"

bring back to life

to remain alive or in existence : live on

to give new life or vigor to

relating to, occupied with, or fond of feasting, drinking, and good company

(= "the good life")