lucubrate

/ˈluːkjʊbreɪt/
verb
  1. To write, study, or work laboriously, especially late at night.
    • She lucubrated over her thesis until dawn.
    • Many poets lucubrate in the quiet of the night.
    • The scholar would lucubrate for hours by candlelight.
Synonyms
What does "lucubrate" mean? | whatsthatwordmean | whatsthatwordmean