lugubrious (adj.) Look up lugubrious at Dictionary.com
c.1600, from Latin lugubris "mournful, pertaining to mourning," from lugere "to mourn," from PIE root *leug- "to break; to cause pain" (cognates: Greek lygros "mournful, sad," Sanskrit rujati "breaks, torments," Lettish lauzit "to break the heart"). Related: Lugubriously; lugubriousness.