showing or having no interest, energy etc

uncaring, disinterested

(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

having no interest or opinion; neither for nor against

unfeeling, uninterested

having or showing no interest or enthusiasm

easy-going, laid back

stubborn

pig-headed, stubborn

influenced by what exists or is real, what can be seen, touched etc and not by emotions; an aim, purpose

fair, impartial

a person with great self-control when suffering difficulties, pain etc

philosophic

not exactly excited

apathetic, stupid

not social; outside the usual working day

unfeeling, uninterested

not sympathetic

without agreement in feeling