Lewis Short
(verb) : maestĭfĭco (moest-), āvi, ātum, 1, maestus-facio
* To make sad or sorrowful, to sadden (post-class.): si paupertas angit, si luctus maestificat,Aug. Ep. 121: facies umbris maestificata larvalibus,Sid. Ep. 3, 13 med.; Mart. Cap. 9, § 888.
Charlton T. Lewis, Charles Short, A Latin Dictionary