ˌdifəˈdāshən noun
( -s )
Etymology: Medieval Latin diffidation-, diffidatio, from diffidatus (past participle of diffidare to renounce one's vassalage, renounce friendship, from Latin dif- — from dis- — + fides faith) + Latin -ion-, -io -ion — more at faith
archaic : a renunciation of faith or allegiance : formal severing of peaceful relations