lust - A powerful urge or longing – a deep-seated drive that can sometimes lead to irrational or impulsive behavior, often of a sexual nature.
He liked reading the old story about the prince who had a lust for power that drove him to betray even his closest allies.
relent - To surrender or agree after resisting or opposing, often due to persuasion, pressure, or changing circumstances.
Out of pride, he would always refuse to accept assitance, but when things hit rock bottom, he relented, and finally accepted help from others.
