Fóre-swerian

According to the Old English Dictionary:

fóre-swerian

p. ic, he -swór, ðú -swóre, pl. -swóron; pp. -sworen To FORESWEAR, declare before; antejūrāre :-- Ðæt land, ðe ic fóreswór heora fæderum terram, pro qua [ante-] jūrāvi patrĭbus eōrum, Num. 14, 23. Ðæt land, ðe ðú hira fæderum fóreswóre terram, pro qua [ante-] jūrasti patrĭbus eōrum, 11. 12. fore-swerian