go-to – adj. always helpful : producing desired results or information when needed

temper – n. heat of mind or emotion : proneness to anger

volatile – adj. likely to change in a very sudden or extreme way : having or showing extreme or sudden changes of emotion : likely to become dangerous or out of control

opposite – adj. completely different

blow up – phrasal verb to lose self-control especially : to become violently angry : n. an outburst of temper