treachery, infidelity, breach of trust, double-dealing, falsity, perfidy (literary), unfaithfulness, falseness, betrayal of trust, Collins Dictionary TRAITOROUS Definition & Meaning - Merriam-Webster
Involving deliberate faithlessness and a lack of loyalty. Disloyalty / Unfaithfulness Treachery / Perfidy Double-dealing / Deceitfulness Subversiveness Fickleness Loyalty / Fidelity Devotion / Dedication Faithfulness / Trustworthiness Steadfastness Contextual Usage traitorousness
Traitorousness - Definition, Meaning & Synonyms | Vocabulary.com breach of trust