Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
rĕprĕhenso, āre, v. freq. a. [reprehendo], to hold back continually, detain from time to time (very rare, perh. ἅπ. εἰρ): reprehensans singulos, Liv. 2, 10, 3 Weissenb. ad loc.