Perfidy

['pɜːfɪdɪ] or ['pɝfədi]

(noun.) betrayal of a trust.

Checked by Leon--From WordNet

(n.) The act of violating faith or allegiance; violation of a promise or vow, or of trust reposed; faithlessness; treachery.

Typist: Vivienne

n. Perfidiousness, treachery, treason, defection, disloyalty, breach of faith, foul play, Punic faith.

Typed by Camilla