mercy
/ˈmər-sē/
noun
compassion or forbearance shown especially to an offender or to one subject to one's power; also : lenient or compassionate treatment
imprisonment rather than death imposed as penalty for first-degree murder
a blessing that is an act of divine favor or compassion
noun
euthanasia
idiom
in a position or situation in which one can be harmed by (someone or something one cannot control)
The army advanced, and the people were at their mercy.