stolid
/ˈstä-ləd/
adjective
having or expressing little or no sensibility : unemotional
impassive stoic phlegmatic apathetic stolid mean unresponsive to something that might normally excite interest or emotion. impassive stresses the absence of any external sign of emotion in action or facial expression. stoic implies an apparent indifference to pleasure or especially to pain often as a matter of principle or self-discipline.