vital

/ˈvaɪt̬əl/

• phonetics
• /ˈvaɪt̬əl/ 

• adjective
• Relating to, or characteristic of life.
  vital energies; vital functions; vital actions
• Necessary to the continuation of life; being the seat of life; being that on which life depends.
  The brain is a vital organ.
• Invigorating or life-giving.
• Necessary to continued existence.
  The transition to farming was vital for the creation of civilisation.
• Relating to the recording of life events.
  Birth, marriage and death certificates are vital records.
• Very important.
  It is vital that you don't forget to do your homework.
• Containing life; living.
• Capable of living; in a state to live; viable.
• 同義詞 : crucial; necessary; significant; extant; kicking; live; lifely;
• 反義詞 : mortal;