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Vital

NFS

vi·tal
adjective
vital (adjective)

1. absolutely necessary or important; essential:
"secrecy is of vital importance" · "it is vital that the system is regularly maintained"
· indispensable to the continuance of life:
"the vital organs"

2. full of energy; lively:
"a beautiful, vital girl"

3. archaic
fatal:
"the wound is vital"