Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
nĕgōtĭālis (sometimes incorrectly written nĕgōc-), e, adj. [negotium], of or belonging to business, pertaining to affairs (rare): negotialis (constitutio) est, in quā quid juris ex civili more et aequitate sit, consideratur (opp. juridicialis), Cic. Inv. 1, 11, 14; cf. id. ib. 2, 21, 62: (locum) negotialem, quam πραγματικήν vocat (Hermagoras), in quā de rebus ipsis quaeritur, remoto personarum complexu, Quint. 3, 6, 58; cf. 3, 6, 57; 3, 7, 1; 2, 21, 3: epistulae sunt aut negotiales, aut familiares. Negotiales sunt argumento negotioso et gravi, Jul. Val. Ars Rhet. 27 Mai.: causae, Schol. Juv. 7, 123.