grim

not to be placated or appeased or moved by entreaty

“grim determination”

“grim necessity”

“Russia's final hour, it seemed, approached with inexorable certainty”

“relentless persecution”

shockingly repellent; inspiring horror

“ghastly wounds”

“the grim aftermath of the bombing”

“the grim task of burying the victims”

“a grisly murder”

harshly ironic or sinister

“black humor”

“a grim joke”

“grim laughter”

“fun ranging from slapstick clowning … to savage mordant wit”

harshly uninviting or formidable in manner or appearance

“a dour, self-sacrificing life”

“a forbidding scowl”

“a grim man loving duty more than humanity”

“{'source': 'J.M.Barrie', 'text': 'undoubtedly the grimmest part of him was his iron claw'}”

filled with melancholy and despondency

“gloomy at the thought of what he had to face”

“gloomy predictions”

“a gloomy silence”

“took a grim view of the economy”

causing dejection

“a blue day”

“the dark days of the war”

“a week of rainy depressing weather”

“a disconsolate winter landscape”