lucubrate
To work diligently by artificial light; to study at night.
rare
Instead, as Oklahoma’s tenure committee lucubrated over Hill’s future, […]
To work or write like a scholar.
[…] I shall not hesitate to repeat some of my former thoughts, when lucubrating upon the same subject.
1846, Nathaniel Chipman, in Daniel Chipman, The Life of Hon. Nathaniel Chipman, LL.D., p. 261,
Where it comes from
First attested in 1623; borrowed from Latin lūcubrātus, perfect passive participle of lūcubrō (“to work by candlelight”) (see -ate (verb-forming suffix)), from lūx (“light”).
Adapted from the Wiktionary entry lucubrate (CC BY-SA 4.0).