stol·id 
/ˈstɑ:ləd/ adjective
/ˈstɑ:ləd/ adjective [more stolid; most stolid] : showing little or no emotion : not easily excited or upset
▪ She remained stolid during the trial. ▪ a stolid face
▪ She remained stolid during the trial. ▪ a stolid face
— stol·id·ly adverb
▪ The guard stood stolidly at his post.
▪ The guard stood stolidly at his post.
