(of the skin) made hard (by rough work etc)

cruel, insensitive

(of a person) taking pleasure in causing pain to, watching the suffering of, others

vicious, pitiless; causing pain

intentional and not by chance

intentional

(of a person) not favouring a particular side, opinion etc (in a quarrel)

unfeeling, impartial

(of a person) showing no sign of feeling

aloof, cool

not influenced by personal feelings; not referring to any particular person

cold, unfriendly

cruel; without moral feeling

animal

not humane

animal, savage

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

mean, heartless

having, covered with, many stones; hard, cold and unsympathetic

hard, icy in appearance, response

not showing kindness

not nice

not sympathetic

without agreement in feeling