Not friendly; appropriate to an enemy; showing the disposition of an enemy; showing ill will and malevolence or a desire to thwart and injure.
Of a hostile takeover.
Aggressive; antagonistic.
Unwilling.
An enemy.
Not noble; ignoble; base.
Of a metal, being at the lower end of the electrochemical series, i.e. oxidising readily.
To make (someone or something) no longer noble