Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
persector, āri, v. freq. [persequor], to follow or pursue eagerly, to investigate (ante-class.): persectari hoc volo, Sceledre, nos nostri an alieni simus, Plaut. Mil. 2, 5, 20; Lucr. 4, 1010: nec persectari primordia singula quaeque, id. 2, 165.