1.  mercifulness(n = noun.feeling) mercy - the feeling that motivates compassion;
is a kind of compassion, compassionateness
has particulars: forgiveness
Derived form adjective merciful₁

2.  mercifulness(n = noun.attribute) mercy - a disposition to be kind and forgiving; "in those days a wife had to depend on the mercifulness of her husband"
is a kind of humaneness
has particulars: compassion, pity, forgivingness, kindness, lenience, leniency, lenity, mildness
Antonym: mercilessness
Derived form adjective merciful₂

3.  mercifulness(n = noun.act) clemency, mercy - leniency and compassion shown toward offenders by a person or agency charged with administering justice; "he threw himself on the mercy of the court"
is a kind of lenience, leniency
has particulars: commutation, re-sentencing, amnesty, free pardon, pardon, quarter, reprieve, respite
Derived form adjective merciful₁