Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
multĭ-pŏtens, ntis, adj. [multum-potens], very powerful, very mighty (Plautin.): frater Jovis, Plaut. Trin. 4, 1, 1: Venus, id. Cas. 4, 4, 17: pectus, id. Bacch. 4, 4, 9; v. Ritschl ad h. l.