truthening

Verb

truthen (third-person singular simple present truthens, present participle truthening, simple past and past participle truthened)

1. (transitive) To make true; to cause to adhere to the truth; to prove, validate, or support the veracity of
   • So in order to truthen this, before the letter goes, I forthwith to get the Majestick on the foan, and by God's mercy have one good room left, on the 1st floor.1931, Robert Massie Freeman, John Drinkwater, Saml: Pepys, Listner, page 192