undemonstrative (adjective) undemonstrative: cool
Sinonime: aloof,
annoyed,
apathetic,
chill*,
chilly,
distant,
frigid,
impertinent,
impudent, incurious,
indifferent,
insolent, lukewarm,
offended, offhand, offish, procacious,
remote,
reserved,
reticent,
solitary*, standoffish, unapproachable, uncommunicative, unenthusiastic,
unfriendly,
uninterested, unresponsive, unsociable, unwelcoming,
withdrawn