Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* haesĭtābundus, a, um, adj. [haesito, II.], stammering, faltering, hesitating: expalluit notabiliter et haesitabundus inquit: Interrogavi, etc., Plin. Ep. 1, 5, 13.