aggressive

Adjective

• characteristic of an enemy or one eager to fight
  • aggressive acts against another country
    
  • a belligerent tone
    

• tending to spread quickly
  • an aggressive tumor
    

• having or showing determination and energetic pursuit of your ends; positive in his convictions"
  • an aggressive businessman
    
  • an aggressive basketball player
    
  • he was aggressive and imperious
    
  • aggressive drivers
    

Related words

• Synonyms: 
  belligerent , fast-growing(a) , strong-growing
• Antonyms: 
  unaggressive , nonaggressive