I.to track or trace out, as a dog; to search after (class.).
I. Lit.: “canum tam incredibilis ad investigandum sagacitas narium,” Cic. N. D. 2, 63, 158: “illam,” Plaut. Merc. 3, 4, 79: “latentes conscios,” Suet. Dom. 10: “David et Viros ejus,” Vulg. 1 Reg. 24, 3.—
II. Trop., to trace out, find out, discover, investigate, search into: “nihil investigo quicquam de illa,” Plaut. Merc. 4, 6, 13: “quid dare velis, qui istaec tibi investiget indicetque,” id. Rud. 5, 2, 35: “nil tam difficile est, quin quaerendo investigari possiet,” Ter. Heaut. 4, 2, 8: “qui sim, nequeo certum investigare,” Plaut. Aul. 4, 9, 4: “Cibyratici canes investigabant et perscrutabantur omnia,” Cic. Verr. 2, 4, 21, § 47: “conjurationem,” id. Sull. 1, 3; 30, 85: “veri investigandi cupidus,” id. Fin. 4, 8, 20: “de Lentulo,” id. Att. 9, 7, 6: “diligentia inimici investigatum est, quod latebat,” id. Lig. 1, 1: “ubi Lentulus sit, investigare non possum,” id. Att. 9, 1, 2: “conatus,” Cic. Verr. 1, 16, 48: “perquirere et investigare homines,” Q. Cic. Petit. Cons. 8: “quae per notas scripta,” to decipher, Suet. Caes. 56.