unfaithfulness
Cheating on someone
Unfaithfulness is the quality of being disloyal or untrue to commitments.
Most commonly it refers to sexual or romantic betrayal: His unfaithfulness destroyed their marriage.
It extends to any breach of trust or duty—unfaithfulness to principles, to one's word, or to a cause.
The word carries moral weight, implying not just failure but violation of an obligation.
Deliberate violation of trust
- traitorOne who betrays allegiance
- backstabbingCovert betrayal of trust
- double-crossTreacherous deception of partner
- treasonBetraying one's nation
perfidy · disloyalty · defection · turncoat · Judas · duplicity · double-dealing · sedition
Outside the marriage bond
- affairRomantic entanglement outside commitment
- cheatingDeceptive rule-breaking
- mistressIllicit female lover
- paramourLover in secret affair
lover · two-timing · philanderer · cuckold · liaison · tryst · fling · concubine
Disposition toward falsehood
- liesDeliberate untruths
- deceitDeliberate misleading of others
- duplicitousDeliberately deceptive in nature
- sneakingMoving to avoid detection
secrecy · cover-up · gaslighting · manipulation · falseness · misleading · untrustworthy · pretense
Renunciation of former beliefs
- heresyBelief opposing official doctrine
- idolatryVeneration of false gods
- backslidingReverting to former sins
- waywardnessStubborn resistance to guidance
irreverence · sacrilege · impiety · ungodliness · desertion · lukewarm · fallen · straying
Crushing emotional pain
- anguishIntense mental suffering
- devastationSevere widespread destruction
- rejectionDenial of acceptance
- woundedHaving sustained harm
scorned · brokenhearted · crushed · betrayed · pain · humiliation · jealousy · suspicion
treachery
Deliberate violation of trust
- traitorOne who betrays allegiance
- backstabbingCovert betrayal of trust
- double-crossTreacherous deception of partner
treason · perfidy · disloyalty · defection · turncoat · Judas · duplicity · double-dealing · sedition · conspiracy
extramarital
Outside the marriage bond
- affairRomantic entanglement outside commitment
- cheatingDeceptive rule-breaking
- mistressIllicit female lover
paramour · lover · two-timing · philanderer · cuckold · liaison · tryst · fling · concubine · straying
dishonesty
Disposition toward falsehood
- liesDeliberate untruths
- deceitDeliberate misleading of others
- duplicitousDeliberately deceptive in nature
sneaking · secrecy · cover-up · gaslighting · manipulation · falseness · misleading · untrustworthy · pretense · concealment
apostasy
Renunciation of former beliefs
- heresyBelief opposing official doctrine
- idolatryVeneration of false gods
- backslidingReverting to former sins
waywardness · irreverence · sacrilege · impiety · ungodliness · desertion · lukewarm · fallen · straying · disobedience
heartbreak
Crushing emotional pain
- anguishIntense mental suffering
- devastationSevere widespread destruction
- rejectionDenial of acceptance
wounded · scorned · brokenhearted · crushed · betrayed · pain · humiliation · jealousy · suspicion · insecurity
- Untrustworthinessdisloyalty, cheating, betrayal, lying, deceit
- relationship problemsaffair, disloyalty, adultery, cheating, communication breakdown
- vicesgreed, envy, lust, gluttony, vanity
- infidelityadultery, affair, adulteress, cheating, cheater
- marital offensesadultery, bigamy, spousal abuse, cruelty, neglect
- deceptionlie, lies, lying, fake, fraud
unfaithfulnessfaithfulness
Devoted loyalty maintained
loyalty · fidelity · marital fidelity · allegiance · devotion
unfaithfulnesstrustworthiness
Quality of being reliable
reliability · dependability · honesty · integrity · truthfulness
unfaithfulnessfaith
Trust without proof
faithfulness · piety · devoutness · godliness · devotion
faith, faithful, unfaithful, faithfully, faithfulness, bona fide, confide, faithless, infidelity