/ˈfeɪθ.ləs/
ADJECTIVE
Not remaining loyal to a person, relationship, promise, duty, or obligation; breaking trust or failing to honor an allegiance.
Describing someone who breaks another person's trust, fails to keep a promise, or acts disloyally toward someone to whom they owe loyalty.
Describing a person who is unfaithful to a spouse or romantic partner, especially by engaging in a relationship with someone else.
Describing someone who betrays a country, political cause, leader, or organization by violating an allegiance or supporting an opposing side.
ADJECTIVE
Not having or showing belief in a religion, God, or religious principles.
Describing someone who lacks religious faith or does not believe in the teachings or principles of a particular religion.