Adjective
1. having or revealing little emotion or sensibility; not easily aroused or excited;
"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"2. deliberately impassive in manner;
"deadpan humor""his face remained expressionless as the verdict was read"