mournful, dismal, or gloomy, especially in an affected, exaggerated, or unrelieved manner
c.1600, from L. lugubris "mournful, pertaining to mourning," from lugere "to mourn," from PIE base *leug- "to break, to cause pain" (cf. Gk. lygros "mournful, sad," Skt. rujati "breaks, torments," Lettish lauzit "to break the heart").
"Suci ate with what seemed to me to be lugubrious determination."
- Elizabeth Kolbert, The Sixth Extinction: an Unnatural History