Lewis & Short

incesto, āvi, 1, v. a. [incestus], to pollute, defile (poet. and in post-Aug. prose).

  1. I. In gen.: totamque incestat funere classem, Verg. A. 6, 150: aras, Stat. S. 5, 5, 4: diem (Furiae), id. Th. 11, 120; Claud. Cons. Mall. Theod. 267.
  2. II. In partic., to dishonor, defile with lust: puellam, Plaut. Poen. 5, 2, 136: filiam, Tac. A. 6, 19: se, Suet. Tib. 43: thalamos novercae, Verg. A. 10, 389.