stol ‧ id /ˈstɒləd, ˈstɒlɪd $ ˈstɑː-/ BrE AmE adjective
[ Date: 1500-1600 ; Language: Latin ; Origin: stolidus 'dull, stupid' ]
someone who is stolid does not react to situations or seem excited by them when most people would react – used to show disapproval SYN impassive
—stolidly adverb