Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
multĭ-formis, e, adj. [multus-forma], many-shaped, multiform; various, diverse, manifold (class.): nuces, Col. 7, 9, 8: qualitates, Cic. Ac. 1, 7, 26: multiformes sumus, have a fickle character, Sen. Ep. 120, 23: artes multiformes et variae, Gell. 19, 14, 1: varius, multiplex, multiformis, Aur. Vict. Epit. 14, 6: Ennius, Front. ad Verr. 1: historia, Amm. 16, 5, 7.
Hence, adv.: mul-tĭformĭter, in many ways, variously (post-Aug.): varie et multiformiter disserere, Gell. 9, 5, 7; Plin. 36, 27, 69, § 202.