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vital

vital /ˈvaɪtl̟/ adjective
vital
/ˈvaɪtl̟/
adjective
Britannica Dictionary definition of VITAL
[more vital; most vital] : extremely important : crucial
always used before a noun : needed by your body in order to keep living see also vital signs
[more vital; most vital] : very lively or energetic

— vitally

adverb