faith·​less ˈfāth-ləs How to pronounce faithless (audio)
: not true to allegiance or duty : treacherous, disloyal
a faithless servant
: not to be relied on : untrustworthy
a faithless tool
faithlessly adverb
faithlessness noun
Choose the Right Synonym for faithless

faithless, false, disloyal, traitorous, treacherous, perfidious mean untrue to what should command one's fidelity or allegiance.

faithless applies to any failure to keep a promise or pledge or any breach of allegiance or loyalty.

faithless allies

false stresses the fact of failing to be true in any manner ranging from fickleness to cold treachery.

betrayed by false friends

disloyal implies a lack of complete faithfulness to a friend, cause, leader, or country.

disloyal to their country

traitorous implies either actual treason or a serious betrayal of trust.

traitorous acts punishable by death

treacherous implies readiness to betray trust or confidence.

a treacherous adviser

perfidious adds to faithless the implication of an incapacity for fidelity or reliability.

a perfidious double-crosser

Example Sentences

faithless friends who deserted him in his time of need
Recent Examples on the Web Through it all, forgiveness is given by the Countess Almaviva to her faithless husband in a seemingly impossible number of ways, making this the ultimate woman’s revenge in opera. Los Angeles Times, 16 Aug. 2021 The Exorcist — The gold standard of horror distills the battle between good and evil down to its bare essence, a child possessed and faithless priest, maybe right next door. Mark Hughes, Forbes, 29 Oct. 2021 Following the ten faithless votes in 2016, more states adopted laws that prevent this. Fortune, 30 Nov. 2020 The objection to the faithless elector was rejected by both chambers. Nicholas Wu, USA TODAY, 6 Jan. 2021 FairVote found that since the founding of the Electoral College, there have been 167 faithless electors. Caroline Linton, CBS News, 15 Dec. 2020 In the 2016 presidential election, Donald Trump had two faithless electors both in the state of Texas: one vote went for Ron Paul and one went for John Kasich. Siraj Hashmi, Washington Examiner, 14 Dec. 2020 The seven faithless electors in 2016 made up the largest number of electors voting contrary to their party’s winner in over a century. Elizabeth Thompson, Dallas News, 3 Dec. 2020 However, most states have laws which nullify the votes of faithless electors, and there are not expected to be enough to alter the outcome of the election. Grace Segers, CBS News, 8 Dec. 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'faithless.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


Middle English feithles, from feith faith entry 1 + -les -less

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of faithless was in the 14th century

Dictionary Entries Near faithless

Cite this Entry

“Faithless.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2022.

Kids Definition



faith·​less ˈfāth-ləs How to pronounce faithless (audio)
: not true to allegiance or duty : disloyal
: not worthy of being trusted or relied upon
faithlessly adverb
faithlessness noun

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