betravail

From Middle English betravailen, equivalent to be- +‎ travail.

betravail (third-person singular simple present betravails, present participle betravailing, simple past and past participle betravailed)

1. (transitive) To work at; compose (a book, etc.).
2. (transitive) To work for; earn by labour.
3. (transitive) To do violence to; violate.

• betravel