be out for blood

calculated deliberate determined intense persistent resolute strong-willed

bent bound dead set on decided firm fixed intent mean business obstinate playing hard ball positive purposive settled single-minded stalwart staunch steadfast steady stubborn tenacious undeviating unfaltering unwavering

irresolute weak

aimless thoughtless undetermined unplanned wanton

avenge get back at vindicate

defend fix get justify match punish reciprocate redress repay requite retort return score square

even the score fight back fix one's wagon get even give comeuppance hit back kick back make reprisal pay back pay back in spades pay off return the compliment settle up settle with stick it to take an eye for an eye turn the tables on venge

deny depart fail leave lose refuse request surrender take

forgive pardon sympathize