Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dē-plŭo, ŭi, ūtum, ĕre, v. n., to rain down (poet. and very rare): multus in terras deplueretque lapis, Tib. 2, 5, 72; (in Prop. 2, 20, 8 (3, 13, 8 M.), the true reading is defluit; so Col. 10, 206 poet.): depluta terra, drenched, Boëth. Arist. analyt. post. 2, 13.