vital

US /ˈvaɪ.t̬əl/
UK /ˈvaɪ.t̬əl/
"vital" picture
1.

absolutely necessary or important; essential.

:
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It is vital that you keep accurate records.
•
Good communication is vital in a healthy relationship.
:
essentialcrucialindispensablenecessarykey
2.

full of energy; lively.

:
•
She has a vital personality.
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The old man was still surprisingly vital.
:
energeticlivelydynamicvigorousspirited