词根词缀：atroc-, atroci-
【来源及含义】Latin: cruel, fierce; dark-looking, gloomy
【同源单词】atrocious, atrociously, atrociousness, atrocity
词根词缀：lygo-, lyg-
【来源及含义】Greek: shadow, shadowy; shade, darkness; twilight; gloomy
【相关词根词缀】Other related "dark; shadow, shade; black" units: melan-; nigri-; nocti-; nycti-; scoto-; skio-; umbra-.
【同源单词】lygomania, lygophil, lygophile, lygophobia
词根词缀：triste-, tristi-
【来源及含义】Latin: sad, gloomy, melancholia