Translation guide
The idea of staying the same, being loyal, or continuing without change. In Japanese, this is expressed through different words depending on whether you mean faithfulness in relationships, unchanging natural laws, or steady persistence.
Expressing unwavering loyalty, devotion, or fidelity to a person, cause, or duty.
Refers to chastity or marital fidelity, often used in the context of a wife's faithfulness.
彼女は夫に貞節を尽くした。
She remained faithful to her husband.
Loyalty or allegiance, often to a lord, country, or organization. Stronger than simple faithfulness.
彼は王に忠誠を誓った。
He swore loyalty to the king.
A literary term for chastity, fidelity, or moral integrity, especially of a woman.
彼女は操を守り通した。
She preserved her chastity to the end.
Describing something that does not change over time, such as natural laws, principles, or conditions.
Means unchanging or constant. Used for abstract concepts like truth, laws, or principles.
自然の法則は不変だ。
The laws of nature are constant.
Refers to homeostasis or constancy in a scientific or technical sense, like in biology or systems.
A literary or philosophical term meaning eternal and unchanging, often paired with 流行 (trend) in the phrase 不易流行.
Expressing the quality of continuing firmly in a course of action despite difficulty or opposition.
A four-character compound meaning indomitable perseverance; never giving up.
彼は不撓不屈の精神で研究を続けた。
He continued his research with indomitable constancy.
Consistency or coherence in behavior, policy, or thought. Often used in business or logic.
A rare term for a steadfast mind or unwavering resolve.
English 'constancy' covers loyalty, permanence, and perseverance. Japanese uses distinct words for each nuance. Using 不変 for personal loyalty would sound unnatural.
貞節 is specifically about marital fidelity, while 忠誠 is broader loyalty to a superior or group. Do not use 貞節 for loyalty to a company.
The constancy of body temperature is important.
We value the spirit of constancy and change.
His actions lack constancy.
恒心を持って目標に向かう。
He pursues his goal with constancy of mind.