Lewis Short
(verb) : causĭfĭcor, āri, causa-facio
* To allege a cause, to make a pretext or pretence, to pretend (very rare): haut causificor quin eam Ego habeam,I offer no pretext against keeping her,Plaut. Aul. 4, 10, 25: blaterans atque causificans,App. M. 10, p. 242.
Charlton T. Lewis, Charles Short, A Latin Dictionary