Perquiro, perquîris, pen. prod. perquísiui, perquisitum, penu. pro. perquírere. Cæs. To make diligent searche: to examine: to askc and enquire diligently.
Lewis and Short: Latin dictionary
per-quīro, sīvi, sītum, 3, v. a. [quaero]. I.To ask or inquire after diligently, to make diligent search for any thing: perquirunt, quid causae siet, Plaut. Stich. 1, 3, 49: vasa, Cic. Verr. 2, 4, 18, 39; cf. id. ib. 2, 3, 58, 134; id. Cael. 22, 53: a contemplandis rebus perquirendisque deterreri, id. Fin. 5, 18, 48: aditus viasque in Suevos perquirit, Caes. B. G. 6, 9 fin.; Plin. 6, 8, 8, 23.— Absol.: perquirite et videte si, etc.,