Wiþerweardlíce

According to the Old English Dictionary:

wiþerweardlíce

adÞurh ðæt ðe ðú ðysne wuldres cyning áhénge, ðú dydest wyþerwerdlíce ongeán ðé and eác ongeán mé (thou hast acted against thine own interests and against mine. v. Gospel of Nicodemus c. 18, v. 11), Nicod. 29; Thw. 17, 10. wiþerweardlice

Related words: Detrimentally, against the interests of any one:--