Aggressive, Unfriendly, Antagonistic
Puzzle 1 of Spy World Medium Pack
Question is: Aggressive, Unfriendly, Antagonistic
and the answer is: HOSTILE
Word Meaning:
HOSTILE — Not friendly; appropriate to an enemy; showing the disposition of an enemy; showing ill will and malevolence or a desire to thwart and injure.
Definitions from Wiktionary.