be faithful

Keep your promises

To be faithful is to remain loyal and committed—to a person, promise, cause, or belief.

Most often it describes romantic or marital loyalty: He swore to be faithful to her.

But faithfulness extends to any sustained allegiance: be faithful to your principles, be faithful to the original text.

The phrase implies constancy over time, especially when tested.

Related

constancy · stay true · steadfastness · loyalty · fealty · sanctity · commitment · honesty · true-hearted · truthfulness · adherence · accountability · integrity · trustworthiness · man of his word · reliability · exclusivity · keeper

Opposites
romantic/sexual loyalty

be faithfulcheat

Act dishonestly to win

commit adultery · betray · stray · have an affair · two-time

trust and reliability

be faithfulbetray

Violate a trust

abandon · desert · double-cross · forsake · turn traitor

religious/ideological commitment

be faithfulapostatize

Abandon one's religion

lose faith · defect · turn one's back on · fall away · backslide

Family

faith, faithful, unfaithful, fidelity, faithfully, faithfulness, faithless, unfaithfulness, infidelity

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Positive · Everyday, not technical · Rated G