Lewis & Short

ob-trunco, āvi, ātum, 1, v. a., to cut off, lop away; to trim, prune.

  1. I. Lit. (post-Aug. and very rare): vitem, Col. 4, 29, 13.
  2. II. In gen., to cut down, cut to pieces, kill, slay, slaughter (not in Cic. or Cæs.; syn.: trucido, jugulo, occido): ipsus Amphitruo optruncavit regem Pterelam in proelio, Plaut. Am. 1, 1, 259: (Medea) puerum interea obtruncat, Poët. ap. Cic. N. D. 3, 26, 67: ceteri vice pecorum obtruncabantur, Sall. Fragm. ap. Non. 497, 27: caedere alios, alios obtruncare, id. J. 97, 5: regem, Liv. 1, 5: (hostes), Sall. J. 67, 2: cervos ferro, Verg. G. 3, 374: gallum, Plaut. Aul. 3, 4, 10; Liv. 7, 26, 5; 8, 24, 9; 10, 38, 11; Curt. 6, 1, 1; Just. 16, 5, 15; Tac. H. 1, 80; 3, 12.