DictionaryinfidelityUnfaithfulness
noun

infidelity

in-fih-DEL-uh-tee/ˌɪnfɪˈdeləti/

Failure to remain faithful, especially to a romantic partner.

The concealed romantic meeting reveals the married person's infidelity.

Married adult conceals romantic meeting with another adult, visible ring, discreet.
Etymology

The pieces express the quality of being unfaithful. Alongside religious unbelief, the word denoted disloyalty to a person, first a sovereign and later a lover or spouse.

In context

MoonchaseDrama81:58
I've told you many times, I have a girlfriend. And I don't like infidelity. Neither of us would want our partner to be taken away, right?
Poor guy dumped by crush,yet awaken shock system,buy all budling,stun sexy CEO,get $100M,win heart!

More examples

  • She considers secret romantic messages a form of infidelity.
  • The couple seeks counseling to rebuild trust after infidelity.
  • His repeated infidelities finally end their relationship.

Forms

infidelity · infidelities

fidelity noun — Loyalty to a person or commitment.

Similar words

unfaithfulness
A close equivalent covering romantic betrayal and broken commitments.
adultery
Specifically sexual intercourse involving a married person and someone outside the marriage.
disloyalty
Broader betrayal of allegiance, not necessarily involving romantic relationships.