Vital

 "Vital" is an adjective that means absolutely necessary or essential. Here's how you can use it in English:

General Use:

• "Sleep is vital for good health."
• "Water is vital for all living things."
• "Communication is vital for a successful relationship."

Specific Contexts:

• Importance: "Early detection is vital in the fight against cancer."
• Necessity: "Oxygen is vital for human survival."
• Urgency: "It is vital that we address this issue immediately."

Other Ways to Use "Vital":

• "Of vital importance" (e.g., "Safety is of vital importance to the company.")
• "Play a vital role" (e.g., "Teachers play a vital role in the development of children.")
• "Vital signs" (referring to essential physiological signs like blood pressure, pulse, and temperature)

I hope this helps! Let me know if you have any other questions.