adjectives
urgently needed; absolutely necessary
"a critical element of the plan"; "critical medical supplies"; "vital for a healthy society"; "of vital interest"
performing an essential function in the living body
"vital organs"; "blood and other vital fluids"; "the loss of vital heat in shock"; "a vital spot"; "life-giving love and praise"
full of spirit
"a dynamic full of life woman"; "a vital and charismatic leader"; "this whole lively world"
manifesting or characteristic of life
"a vital, living organism"; "vital signs"
is similar to
possessing life
"the happiest person alive"; "the nerve is alive"; "doctors are working hard to keep him alive"; "burned alive"; "a live canary"