compassionate or kindly forbearance shown toward an offender, an enemy, or other person in one's power; compassion, pity, or benevolence

Have mercy on the poor sinner.

the disposition to be compassionate or forbearing

an adversary wholly without mercy.

the discretionary power of a judge to pardon someone or to mitigate punishment, esp. to send to prison rather than invoke the death penalty.

an act of kindness, compassion, or favor

She has performed countless small mercies for her friends and neighbors.

something that gives evidence of divine favor; blessing

It was just a mercy we had our seat belts on when it happened.

at the mercy of

entirely in the power of; subject to

They were at the mercy of their captors. Also, at one's mercy.

noun

cruelty , intolerance , meanness , uncompassion , implacability , inclemency , incompassion , revenge

noun

benevolence , benignancy , blessing , boon , charity , clemency , commiseration , favor , forbearance , forgiveness , generosity , gentleness , godsend , goodwill , grace , humanity , kindliness , lenience , leniency , lenity , lifesaver , luck , mildness , pity , quarter , relief , ruth , softheartedness , sympathy , tenderness , tolerance , mercifulness , benignity , compassion , discretion , disposal , kindness , placability , toleration