Faithlessness
The Century Dictionary and Cyclopedia
noun.
The character or state of being faithless, in any sense of that word.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
The quality of being
faithless
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
unfaithfulness by virtue of being unreliable or treacherous