undemonstrative Synonyms
unexpansive
unfeeling
temperate
taciturn
stolid
stoic
retiring
reticent
restrained
reserved
remote
quiet
unfriendly
uninterested
unmoved
unemotional
unaffectionate
unresponsive
flirty
uncommunicative
emotionless
standoffish
unaffable
unloving
unapproachable
withdrawn
phlegmatic
passive
detached
cool
controlled
constrained
cold-blooded
cold
chilly
chill
calm
bashful
apathetic
diffident
discreet
dispassionate
passionless
offish
modest
inhibited
inexpressive
indifferent
impassive
guarded