Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
inter-fringo, frēgi, fractum, 3, v. a. [frango], to break to pieces (ante-class. and post-Aug.): si quid ventus interfregerit, Cato, R. R. 44; Plin. 17, 18, 30, § 127.