mercilessness

Noun mercilessness has 2 senses

• mercilessness(n = noun.feeling) cruelty, pitilessness, ruthlessness - feelings of extreme heartlessness;
is a kind of coldheartedness, hardheartedness, heartlessness
Derived form adjective merciless₁

• mercilessness(n = noun.attribute) unmercifulness - inhumaneness evidenced by an unwillingness to be kind or forgiving;
is a kind of inhumaneness, inhumanity
has particulars: pitilessness, ruthlessness, inexorability, inexorableness, relentlessness
Antonym: mercifulness
Derived form adjective merciless₁