imperative

Adjective

• relating to verbs in the imperative mood

• requiring attention or action
  • as nuclear weapons proliferate, preventing war becomes imperative
    
  • requests that grew more and more imperative
    

Noun

• some duty that is essential and urgent

• a mood that expresses an intention to influence the listener's behavior

Related words

• Synonyms: 
  imperative mood , jussive mood , imperative form
• Antonyms: 
  beseeching , pleading , imploring