abjuration
‘solemn renunciation’
Lexical development traced from the Tamil root:
E. abiurgacion, abjuracion, abjuracyon, abiuration < Lat. abiurationem ‘a denying on oath’ < abiurare ‘deny on oath’ < ab ‘off, away from’ + iurare ‘to swear’ < ab < apo- < Tamil ava