ēierō or ēiūrō

   ēierō or ēiūrō āvī, ātus, āre    [ex + IV-], to refuse upon oath, reject by oath, abjure : id forum sibi iniquum eierare, make oath that the tribunal is prejudiced : me iniquum: bonam copiam, i. e. make oath of insolvency. — To resign, abdicate : magistratum, Ta. — To renounce, abjure : eiuratā patriā, Ta.