aggressive

having or showing determination and energetic pursuit of your ends

• “an aggressive businessman”
• “an aggressive basketball player”
• “he was aggressive and imperious; positive in his convictions”
• “aggressive drivers”

marked by aggressive ambition and energy and initiative

• “an aggressive young executive”
• “a pushful insurance agent”
• “a pushing youth intent on getting on in the world”

tending to spread quickly

• “an aggressive tumor”

characteristic of an enemy or one eager to fight

• “aggressive acts against another country”
• “a belligerent tone”