Using a thesaurus, the words that map to "corrupted" (from Latin "altogether broken") are:

"become morally depraved" - "meyz vokul"

"crooked" -> "bent" - kreh

"evil" - vokul

"rotten" -> "foul" - bein

untrustworthy - ni balaan do ov

A good one used by Alduin: tahrodiis, tahrovin (treachery)

Another alternative: Dukaan (dishonor)

"The corrupted mage killed the Argonian."

"Kro wo meyz vokul/kreh/dukaan/etc. krii fin Siigonis."

"I will not yield to your corrupted rule, my lord."

"Zu'u ni fen gahvon wah hin vokul/kreh rel, drogi."