Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sŭper-tĕgo, xi, ctum, 3, v. a., to cover above, cover over: candidaque ossa super nigra favilla tegit (per tmesin), Tib. 3, 2, 10: vasa congestu culmorum et frondium, Col. 9, 14, 14: aliquid testa, Pall. Mart. 9, 3: me tunicā, App. M. 11, p. 263, 34: plures frondibus, Just. 43, 4, 6; Veg. Mil. 2, 25.