Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
interrŏgātīvus, a, um, adj. [interrogo], of or belonging to a question, interrogative: adverbia, Prisc. p. 1059 P.
Adv.: interrŏgātīvē, interrogatively, Ps.-Ascon. ap. Verr. 2, 1, 56; Tert. adv. Marc. 4, 41; Schol. Vet. Juv. 9, 48.