A person who breaks their faith, fails to keep promises, or commits treachery.
Compound of 'faith' (Old English 'faeth') and 'breaker' (Old English 'brecan,' to break). A direct agent noun from the compound 'faithbreach.'
In medieval and early modern contexts, calling someone a 'faithbreaker' was devastating—it wasn't just dishonest behavior, it attacked their core identity and social standing.
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