elucubrate

e·lu·cu·brate

E0097150 (ĭ-lo͞o′kyo͝o-brāt′)tr.v. e·lu·cu·brat·ed, e·lu·cu·brat·ing, e·lu·cu·brates To produce (a written work) by working long and diligently.
[Back-formation from elucubration.]

elucubrate

(ɪˈluːkjʊˌbreɪt) vb (tr) (Literary & Literary Critical Terms) obsolete to work on (a literary work) in a dedicated manner at night-time

e•lu•cu•brate

(ɪˈlu kyʊˌbreɪt)

v.t. -brat•ed, -brat•ing. to produce, as a literary work, by long and intensive effort. [1615–25; < Latin ēlūcubrātus, past participle of ēlūcubrāre to spend the night over (a literary work). See e-, lucubrate] e•lu`cu•bra′tion, n.