Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
per-pĕtro, āvi, ātum, 1, v. a. [patro], to carry through, complete, effect, bring about, achieve, execute, perform, accomplish; to commit, perpetrate (mostly ante-class. and post-Aug.; not in Cic. or Cæs.; rare as verb. finit.; syn.: perago, exsequor, conficio): perpetrat, peragit, perficit, Fest. p. 217 Müll.: opus meum ut volui, Plaut. Ps. 5, 1, 24: primā parte (operis) perpetratā, Varr. L. L. 7, § 110 Müll.: perpetratā caede, Liv. 1, 6; cf.: nemus, in quo perpetrata caedes erat, Curt. 7, 2, 29: id se facinus perpetraturos, Liv. 31, 17, 9: perpetrato sacro, id. 23, 35, 18: sacrificio rite perpetrato, id. 43, 37, 13; 25, 12, 2: pace nondum perpetratā, id. 33, 21, 6: perpetratis quae ad pacem deum pertinebant, id. 24, 11, 1: perpetrato bello, id. 24, 45, 8; 27, 43, 7: cujus (principis) jussu perpetratum ingenuitatis judicium erat, Tac. A. 13, 27 fin.: ad reliqua Judaici belli perpetranda, id. H. 4, 51; id. A. 14, 38: quibus perpetratis, id. ib. 15, 14 fin.; 15, 72 init.: perpetraret Anicetus promissa, fulfil, id. ib. 14, 7; Curt. 4, 13, 16; 6, 3, 18: postremo quasi perpetraturus bellum, imperavit, etc., Suet. Calig. 46 init.: homicidium, Vulg. Exod. 22, 3: fraudem, id. ib. 22, 9: abominationem, id. Deut. 13, 11: qui sibi manus intulit et non perpetravit, Dig. 48, 21, 3.
With ut or ne and subj., to bring it to pass that, that … not, Tac. A. 12, 58; 14, 11.
With inf.: male quod mulier facere incepit, nisi si ecficere perpetrat, Plaut. Truc. 2, 5, 18.