Answer:
Stolid: not easily stirred or moved mentally; unemotional; impassive.
His rival's stolid indifference put the lawyer out of countenance.
Marcus' stolid face revealed none of the thoughts that danced in his mind.
the head of the company was a stolid human being .
The man Stolidly looked at the child, when the child askED him if he can help him find his mother.
Stolid people can generally be expected to take most things in stride.
The soldier's face showed no trace of emotion and was impassive and stolid.