tenebresco
Could not find tenebrescat in Logeion dictionaries.
tenebrescat Verb: present active subjunctive 3rd singular of tenebresco
tĕnē̆bresco (tĕnē̆brasco), ĕre, v. inch. n. [tenebrae],
- to grow or become dark (eccl. Lat.), Hier. in Isa. 5, 12, 10; Aug. Genes. ad Lit. 1, 10 fin.; Vulg. Amos, 8, 9: oculus, id. Zach. 11, 17.
tenebrēsco, ere (tenebrae), finster werden, Tert. adv. Iud. 10. Augustin. de genes. ad litt. 1, 10 extr. Hieron. in Isai. 5, 12, 10. Vulg. Amos 8, 9: ut aër tenebrescat sive frigescat, Augustin. de civ. dei 11, 10, 2. p. 475, 25 D2.
See: tenebrescere
tĕnĕbrēscō, ĕre, intr., se couvrir de ténèbres, sʼobscurcir : Tert. Jud. 10 ; Aug. Hept. 1, 10, 22.