Grim

adjective 1. 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'; 'the stern demands of parenthood'

adjective 2. shockingly repellent; inspiring horror; 'ghastly wounds'; 'the grim aftermath of the bombing'; 'the grim task of burying the victims'; 'a grisly murder'; 'gruesome evidence of human sacrifice'; 'macabre tales of war and plague in the Middle ages'; 'macabre tortures conceived by madmen'

adjective 3. harshly ironic or sinister; 'black humor'; 'a grim joke'; 'grim laughter'; 'fun ranging from slapstick clowning ... to savage mordant wit'

adjective 4. harshly uninviting or formidable in manner or appearance; 'a dour, self-sacrificing life'; 'a forbidding scowl'; 'a grim man loving duty more than humanity'; 'undoubtedly the grimmest part of him was his iron claw'- J.M.Barrie

adjective 5. 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'; 'the darkening mood'; 'lonely and blue in a strange city'; 'depressed by the loss of his job'; 'a dispirited and resigned expression on her face'; 'downcast after his defeat'; 'feeling discouraged and downhearted'

adjective 6. causing dejection; 'a blue day'; 'the dark days of the war'; 'a week of rainy depressing weather'; 'a disconsolate winter landscape'; 'the first dismal dispiriting days of November'; 'a dark gloomy day'; 'grim rainy weather'