A-bredwian

According to the Old English Dictionary:

a-bredwian

p. ade; pp. ad To overthrow, slay? kill? prosternare? occidere? -- Ðeáh ðe he his bróðor bearn abredwade [abradwade Th.] although he had overthrown [exiled? killed?] his brother's child, B. 2619. a-bredwian