Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dēlībĕrābundus, a, um, adj. [delibero], weighing carefully, considering, reflecting, deliberating (rare): consules velut deliberabundi capita conferunt, diu colloquuntur, Liv. 2, 45, 7; 1, 54, 6.