mercy B2

/ˈmɝsi/ Kindness or forgiveness shown to someone you have the power to punish or harm.

amerce C2+

/əˈmɝs/ to punish by an arbitrary fine or penalty

mercilessness C2+

/ˈmɜrsɪləsnəs/ the quality of showing no mercy or compassion

merciful C2+

/ˈmɝsɪfəl/ showing compassion or forgiveness toward those in one's power

merciless C2+

/ˈmɝsɪləs/ showing no mercy; cruel and relentless