| adjective | not to be placated or appeased or moved by entreaty “grim determination” |
| adjective | shockingly repellent; inspiring horror “ghastly wounds” |
| adjective | harshly ironic or sinister “black humor” |
| adjective | harshly uninviting or formidable in manner or appearance; ; ; ; - J.M.Barrie “a dour, self-sacrificing life” |
| adjective | filled with melancholy and despondency “gloomy at the thought of what he had to face” |
| adjective | causing dejection “a blue day” |
| grimness | noun | something hard to endure |
| inexorableness | noun | mercilessness characterized by an unwillingness to relent or let up |
| inexorability | noun | mercilessness characterized by an unwillingness to relent or let up |
| relentlessness | noun | mercilessness characterized by an unwillingness to relent or let up |
| sternness | noun | uncompromising resolution |
| ghastliness | noun | the quality of being ghastly |
| gruesomeness | noun | the quality of being ghastly |
| gloominess | noun | a feeling of melancholy apprehension |
| dispiritedness | noun | a feeling of low spirits |
| downheartedness | noun | a feeling of low spirits |
| lowness | noun | a feeling of low spirits |
| low-spiritedness | noun | a feeling of low spirits |
| dreariness | noun | extreme dullness; lacking spirit or interest |