expressionless
adjective
[ ɪkˈsprɛʃ(ə)nlɪs ]
• (of a person's face or voice) not conveying any emotion; unemotional.
• "her face was expressionless"
Similar:
inscrutable,
unreadable,
deadpan,
poker-faced,
blank,
empty,
vacant,
emotionless,
unemotional,
unexpressive,
inexpressive,
glazed,
fixed,
lifeless,
stony,
wooden,
impassive,
inanimate,
unresponsive,
dull,
dry,
toneless,
monotonous,
drab,
boring,
tedious,
flat,
static,
unmodulated,
unvarying,
undemonstrative,
devoid of feeling/emotion,
apathetic,
unimpassioned,
uninspiring,
weak,