Lewis & Short

maestĭfĭco (moest-), āvi, ātum, 1, v. a. [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.