Definition of mundbriche in English:
 mundbriche
(also mundbryc)
noun ˈmʊndbrɪtʃˈmʌndbrɪtʃ
Law historical Transgression of the rights of protection; a breach of the peace. Also (occasionally): the fine paid for this offence.
Origin
Old English; earliest use found in Laws: Grið. From mund + bruche.