aggressive

adj. hostile; bold, assertive; forceful

For other usage, see Aggression (war crime) In psychology and other social and behavioral sciences, aggression refers to behavior that is intended to cause harm or pain. Aggression can be either physical or verbal. Behavior that accidentally causes harm or pain is not aggression. Property damage and other destructive behavior may also fall under the definition of aggression. Aggression is not the same thing as assertiveness.
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Aggressive /ag·gres·sive/ 1. characterized by aggression. 2. rapidly spreading and invasive, as a tumor. 3. [more]Aggressive - Community and Resources

Adjective
1. 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"
(antonym) unaggressive, nonaggressive
(similar) assertive, self-asserting, self-assertive
(see-also) assertive
2. marked by aggressive ambition and energy and initiative; "an aggressive young exective"; "a pushful insurance agent"; "a pushing youth intent on getting on in the world"
(synonym) enterprising, pushful, pushing, pushy
(similar) ambitious
3. tending to spread quickly; "an aggressive tumor"
(synonym) fast-growing(a)
(similar) invasive
4. characteristic of an enemy or one eager to fight; "aggressive acts against another country"; "a belligerent tone"
(synonym) belligerent
(similar) hostile

adj. aggressive, hostile; bold, assertive; forceful