Synset

having or revealing little emotion or sensibility; not easily aroused or excited
<adj.all>   freq. cnt.: 7 freq. cnt.: 7

impassive

stolid

sample sentences

"her impassive remoteness"
"he remained impassive, showing neither interest in nor concern for our plight"- Nordhoff & Hall
"a silent stolid creature who took it all as a matter of course"-Virginia Woolf
"her face showed nothing but stolid indifference"