Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* oblittĕrus (oblīt-), a, um, adj. [oblino], for oblitteratus, consigned to forgetfulness, forgotten (ante-class.): Laevius oblitteram gentem pro oblitteratam dixit, Gell. 19, 7, 4.