vital

vital /ˈvaɪtl̟/ adjective
vital
/ˈvaɪtl̟/
adjective
Britannica Dictionary definition of VITAL
1 
[more vital; most vital] : extremely important : crucial
2 
always used before a noun : needed by your body in order to keep living — see also vital signs
3 
[more vital; most vital] : very lively or energetic

— vitally

adverb