Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
errōnĕus, a, um, adj. [1. erro], wandering about, straying: vagus atque erroneus, Sen. Ben. 6, 11, 2: canes, Col. 7, 12, 5: erroneus, ἀλήτης, πλάνος, Gloss. Labb.