cruel and very unkind

cruel, remorseless

not sorry for having done wrong

unrepentant

that cannot be calmed or satisfied

merciless, cruel

cruel; without moral feeling

animal

not humane

animal, savage

who or that cannot live for ever; a person

deadly

an animal that is the young of a horse and a donkey; a slipper without a heel

stubborn

showing no pity

without mercy or care

without pity (and determined)

cruel, merciless

(of a person, behaviour, act) showing no pity, sympathy or mercy

mean, heartless

not ready, willing, to forgive

merciless

not becoming less in force, degree

merciless