faithless
adjective
- adjective Lacking faith; lacking belief in something.
- adjective Not believing in God, religion, or a comparable ideology.
- adjective Unfaithful (said of people, towards their partners)
- adjective Not observant of promises or covenants.
- adjective Not true to allegiance, duty, or vows
- adjective Serving to disappoint or deceive
Synonyms
perfidious treacherous disloyal booky dastardly disleal double-crossing double-dealing double-faced double-hearted doublehearted false falseheart false-hearted guiled guileful hollow-hearted illoyal infidelitous insidious traitorous unfaithful treasonable treasonous
Etymology
From Middle English feithles, equivalent to faith + -less.
Webster’s 1913
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “faithless”, CC BY-SA 4.0. Details