vital
adjective
urgently needed; absolutely necessary
“a critical element of the plan”
“critical medical supplies”
Synonymscriticalperforming an essential function in the living body
“vital organs”
“blood and other vital fluids”
Synonymslife-sustainingfull of spirit; full of life
“a dynamic full of life woman”
“a vital and charismatic leader”
Synonymslivelymanifesting or characteristic of life
“a vital, living organism”
“vital signs”
Source: WordNet 3.1, Princeton University
