showing or having no interest, energy etc

uncaring, disinterested

(of a person, behaviour) severely moral and strict

severe in manner

cruel and very unkind

cruel, remorseless

(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

(of a person) showing no sign of feeling

aloof, cool

cruel; without moral feeling

animal

not humane

animal, savage

unconscious as the result of injury, illness etc

indifferent

not sensitive (to touch, light, to the feelings of other people)

indifferent, callous

of, connected with, produced by, machines; (of a person, action) done like machines (as if) without thought

done by machine; machinelike

having, showing, or feeling no mercy

mean, heartless

having or showing no interest or enthusiasm

easy-going, laid back

without ability to feel or move (because of something)

deadened, insensitive

stubborn

pig-headed, stubborn

calm and unemotional (about trouble)

unemotional

paying no attention to a person or thing

indifferent, unconcerned

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

mean, heartless

serious and strict; not kind; (of the weather, attacks of disease etc) strong, extreme; making great demands on skill, ability, patience etc

uncompromising, stern

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

hard, icy in appearance, response

not diplomatic

tactless

not showing kindness

not nice

not sympathetic

without agreement in feeling