Unfaithfulness

Pronunciation: /ˈənˈfeɪθfəɫˌnɛs/

Unfaithfulness (noun)

  1. Not being loyal to a person you promised to stay with, especially in a romantic relationship.
  2. Failure to keep a duty or promise of loyalty, causing others to feel betrayed or unsafe.
  3. In religion, turning away from a god or belief system that someone is expected to follow.

Examples

  • Unfaithfulness breaks loyalty and hurts the relationship.
  • The team suffered because unfaithfulness broke loyalty.