stolid
Definitions
Having or expressing little or no sensibility; unemotional.
Calm, dependable, and showing little emotion or animation.
Examples
Despite the chaotic scene unfolding around him, the guard remained stolid and unmoved.
Her stolid expression gave nothing away, making it impossible to tell if she was pleased or disappointed.
Synonyms
impassive unemotional phlegmatic apathetic indifferent stoic unresponsive
Antonyms
emotional passionate excitable responsive sensitive animated lively