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

cruel, insensitive

not intentional

accidental

having no interest or opinion; neither for nor against

unfeeling, uninterested

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

indifferent, callous

having or showing no interest or enthusiasm

easy-going, laid back

not thinking; selfish; inconsiderate

inconsiderate

(especially) severe or harsh (in judging the conduct of others)

ungenerous

not showing kindness

not nice

not social; outside the usual working day

unfeeling, uninterested

that could not have been imagined

accidental