Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
errābundus, a, um, adj. [erro], wandering to and fro, wandering about (rare; not in Cic. or Caes.): odor, floating about, Lucr. 4, 692: nunc errabundi domos suos pervagarentur, Liv. 1, 29; cf. Suet. Caes. 31: naves (with dispersae), Auct. B. Afr. 2, 4: naves vagabantur, ib. 21, 3: trieris, ib. 44, 2: agmen, Curt. 8, 4, 6.
Poet. transf.: vestigia bovis, Verg. E. 6, 58.