What does faithlessness mean?
Faithlessness is a noun denoting the state or quality of lacking faith — whether that faith takes the form of personal loyalty, trustworthiness, or religious belief. Its dominant modern sense concerns disloyalty: the betrayal of a promise, a cause, an ally, or an oath. The word carries a strongly negative, formal register, appearing most often in literary, political, or historical writing where acts of treachery are condemned. A secondary sense refers to unbelief or the absence of religious conviction, though this use has grown less frequent over time. Formed from the adjective faithless with the noun-forming suffix -ness, it belongs to a family of words built on 'faith,' itself rooted in the Latin fides, meaning trust or confidence. Related terms such as fidelity, infidelity, and perfidy share this heritage. Because it names both interpersonal betrayal and spiritual doubt, faithlessness can carry either moral or theological weight depending on context.
The quality of lacking faith, loyalty, or trustworthiness; betrayal of a person, promise, or cause.
"His faithlessness toward his oldest friend shocked everyone who knew them."
Strongly negative and formal; often used of political or personal betrayal rather than everyday unreliability.
Absence of religious belief or faith; unbelief.
"The preacher warned his congregation against the creeping faithlessness of the age."
This sense is somewhat archaic or theological in tone and is rare in everyday modern usage.
Rarely used in the plural, as the word normally functions as an uncountable abstract noun. A plural form appears only when referring to distinct instances of faithless behavior.
"The chronicler catalogued the king's many faithlessnesses across four decades of rule."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of faithlessness
Faithlessness derives from the adjective faithless combined with the suffix -ness, which forms abstract nouns of state or quality. The root, faith, entered Middle English from Old French feid, ultimately from the Latin fides, meaning trust, confidence, or belief. Words sharing this Latin ancestry include fidelity, infidelity, confidence, and perfidy.
Related word forms
How faithlessness is actually used
A formal, literary word with strongly negative connotations. In modern usage it most often appears in elevated or historical contexts describing betrayal; the religious sense (lack of belief) is less common today and tends to appear in theological or archaic writing.
Easily confused with faithlessness
Unfaithfulness typically refers specifically to sexual infidelity within a relationship, while faithlessness more broadly denotes disloyalty or lack of belief.