Wiktionary
mirthlessly
adv. In a mirthless manner; sadly.
Usage examples of "mirthlessly".
The lurid, unearthly glow still hovered in the shadowy chamber, lighting ghostily the dead face of Thugra Khotan, which seemed to grin mirthlessly and cavernously at them.
The story mirthlessly described courtship hijinks narrated in dialect by an old-timer, and I aced it.
Once again Raschid did not join them for dinner, and when Umm Faisal explained that he was dining with friends, Felicia smiled rather mirthlessly to herself.
Mairphy laughed mirthlessly: “We’re the skeptics who, in a general way, know where we are.