vital
definition: manifesting or characteristic of life
example: a vital, living organism
speech part: adjective
synonyms:
definition: full of spirit
example:
speech part: adjective
synonyms:
full of life
lively
definition: performing an essential function in the living body
example: vital organs
speech part: adjective
synonyms:
life-sustaining
definition: urgently needed
example:
speech part: adjective
synonyms:
critical