unfaithfulness

Definitions

The quality or state of being disloyal or untrustworthy.

The act of being sexually unfaithful to a spouse or partner; adultery.

Examples

The couple's marriage eventually collapsed due to years of unfaithfulness.

He felt a deep sense of betrayal after discovering his partner's unfaithfulness.

Synonyms

infidelity disloyalty treachery adultery betrayal perfidy falseness

Antonyms

faithfulness loyalty fidelity allegiance devotion constancy trustworthiness