Lewis & Short

ob-nūbo, psi, ptum, 3, v. a., to veil, cover (very rare; syn.: velo, induo, amicio).

  1. I. Lit.: LICTOR, CONLIGA MANVS, CAPVT OBNVBITO, ARBORI INFELICI SVSPENDITO, an old formula ap. Cic. Rab. Perd. 4, 13: flammeo caput nubentis obvolvatur, quod antiqui obnubere vocarint … legem jubere caput ejus obnubere qui parentem necavisset, quod est obvolvere, Paul. ex Fest. p. 170 Müll.; Liv. 1, 26; Val. Fl. 2, 254: ca put tempestate, Sil. 11, 259: comas amictu Verg. A. 11, 77.
    Absol., to veil the head obnubit, caput operit, Paul. ex Fest. p. 184 Müll.
  2. * II. Transf.: mare terras obnubit, Varr. L. L. 5, § 72 Müll.