Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
scībĭlis, e, adj. [scio], that can be known, knowable, discernible (post-class.): Deus non omnibus scibilis, Tert. adv. Marc. 5, 16: scientia rei, Mart. Cap. 4, § 375.