Lewis & Short

ex-tergeo, si, sum, 2; also ex-tergo, 3 (inf. extergere, Vulg. Johan. 13, 5; praes. extergimus, id. Luc. 10, 11: extergunt, id. Baruch, 6, 12; praes. subj. pass. extergantur, Dig. 33, 7, 12, § 22), v. a., to wipe out or off, to wipe dry, wipe (mostly ante- and post-class.).

  1. I. Lit.: extergeto spongia bene, Cato, R. R. 162, 3: columnas, pavimenta, podia spongiis, Dig. l. l.: coronas, Vitr. 7, 3: baxeas, Plaut. Men. 2, 3, 40; cf. id. Rud. 5, 2, 12; 14; 17: manus, id. Most. 1, 3, 110: aera extersa rubiginem celerius trahunt, Plin. 34, 9, 21, § 99.
  2. * II. Transf., to strip clean, to plunder: o Verria praeclara! … quod fanum non eversum atque extersum reliqueris? Cic. Verr. 2, 2, 21 fin.