Unwavering loyalty and fidelity; steadfastness in commitment, often referring to a person's faithfulness to a single allegiance, principle, or cause.
他对待自己的职责始终如一，正所谓忠臣不事二君，贞女不更二夫，绝不会轻易放弃。
He is always consistent in his duties, truly embodying unwavering loyalty and commitment, and will never give up easily.
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