stolid
adj
Definition:
Showing or appearing to feel no emotion; apathetic.
Synonyms:
impassive
apathetic
catatonic
Antonyms:
responsive
expressive
demonstrative
Sentences:
1. In his times of embarrassment, he keep a stolid face as if not caring what they said.
2. He had a stolid attitude in math because nothing is applicable to reality.
Steve Carell as a Joyless Laughing Guy