Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prae-sŭo, ūi, ūtum, 3, v. a., to sew over, sew up; hence, to cover over (poet. and in post-Aug. prose): hasta foliis praesuta, Ov. M. 11, 9: surculos recentibus coriis, Plin. 12, 19, 43, § 96.