Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
convŏlūto, no perf., ātum, 1, v. freq. a. [convolvo], to whirl or roll round rapidly (very rare): cum omni exoletorum turbā, Sen. Ep. 114, 24 (id. Q. N. 7, 9, 2, the true read. is conluctatus, Haase, Fickert).