lu·gu·bri·ousadj \lu̇-ˈgü-brē-əs also -ˈgyü-\
1: mournful; especially : exaggeratedly or affectedly mournful <dark, dramatic and lugubrious brooding — V. S. Pritchett>
First Known Use: 1585
Soames was not in, he had gone down to Somerset House; Bustard was buried up to the hilt in papers and that inaccessible apartment, where he was judiciously placed, in order that he might do as much work as possible; but James was in the front office, biting a finger, and lugubriously turning over the pleadings in Forsyte v. Bosinney.
(Galsworthy, The Forsyte Saga)