形容詞 grim:

1. not to be placated or appeased or moved by entreaty
   同義詞：inexorable, relentless, stern, unappeasable, unforgiving, unrelenting
2. shockingly repellent; inspiring horror
   同義詞：ghastly, grisly, gruesome, macabre, sick
3. harshly ironic or sinister
   同義詞：black, mordant
4. causing dejection
   同義詞：blue, dark, depressing, dingy, disconsolate, dismal, dispiriting, gloomy, sorry, drab, drear, dreary
5. harshly uninviting or formidable in manner or appearance- J.M.Barrie
   同義詞：dour, forbidding
6. characterized by hopelessness; filled with gloom
   同義詞：gloomy, darkening

1. Her face wore a grim, set look.
   她臉上顯出嚴(yán)厲、 木然的神情。
2. I've seen her so-called paintings; they're fairly grim, I can tell you!
   我看見過她那所謂的畫; 一點(diǎn)兒都不好，真的！
3. She stuck to her task like grim death.
   她百折不撓地執(zhí)行任務(wù)。
4. I admire him for his grim courage.
   我佩服他的堅(jiān)韌不拔的勇氣。
5. His expression was grim when he told them they had lost their job.
   當(dāng)他告訴他們說他們已被解雇時(shí)，他的表情十分冷酷。
6. What grim weather!
   多討厭的天氣！

grim

adj.（形容詞）
grim.mer,grim.mest
Unrelenting; rigid.
無情的；嚴(yán)厲的
Uninviting or unnerving in aspect; forbidding:
令人生畏的，猙獰的：討厭人的，使人膽怯的；可怕的：
例句：
.undoubtedly the grimmest part of him was his iron claw.(J.M. Barrie)
.毫無疑問，他身上最可怕的部分就是其鐵爪.(J.M.巴里)

Ghastly; sinister:
可怕的；恐怖的：
例句：
.He made a grim jest at the horrifying nature of his wound.(Reginald Pound)See Synonyms at ghastly
.他對(duì)他可怕的創(chuàng)傷報(bào)以猙獰的一笑.(雷金納德·龐德)參見 ghastly

Dismal; gloomy:
陰沉的；陰暗的：
例句：
a grim, rainy day.
一個(gè)陰暗的雨天

Ferocious; savage:
野蠻的；殘忍的：
例句：
the grim advance of the pillaging army.
一支掠奪性部隊(duì)的野蠻行徑

來源：
Middle English
中古英語
from Old English [fierce, severe]
源自 古英語 [兇猛的，嚴(yán)重的]

【引伸】
grim.ly
adv.（副詞）
grim.ness
n.（名詞）