Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
af-frango (better adf-), ĕre (or adfringo, ĕre), v. a., to strike upon or against something, to break against, break in pieces (very rare, perh. only in Statius): duris adfrangunt postibus ungues, Stat. Th. 10, 47: plenis parvos uberibus, id. ib. 5, 150: hiemes bustis, id. S. 5, 1, 36.