in-fidel (noun) infidel: nonbeliever
Sinonime: above,
apart,
casual,
chilly,
cold, cold fish,
cool,
detached,
distant, forbidding, hard-boiled, hard-hearted,
haughty, incurious,
indifferent, laid back, lone wolf,
loner*, offish, on ice, putting on airs,
reserved,
secluded,
solitary, standoffish, stuck up,
supercilious, thick-skinned, unapproachable,
unconcerned,
unfriendly,
uninterested, unresponsive, unsociable, unsympathetic, uppity,
withdrawnAntonime: concerned,
friendly,
sociable