loyal

Compared meaning: loyal and devoted to someone or something (adjective).

比较义项：忠诚的、忠实的（形容词）。

• true

  More literary or old-fashioned than loyal; typically appears in the fixed phrase 'true to' (a promise, one's word, oneself) rather than describing a person directly.

  比 loyal 更文学化、略显古雅；通常出现在「true to」这类固定搭配中（对承诺、诺言、自己），而不是直接用来描述一个人。

  He has always been true to his word, no matter the cost.

  无论付出什么代价，他始终忠于自己的诺言。

• loyal 本词

  The most common, neutral word for steady support or allegiance; used broadly for people, friends, customers, countries, or organizations, without implying romantic fidelity.

  是表示坚定支持或效忠最常见、最中性的词；广泛用于人、朋友、顾客、国家或组织，不带爱情或婚姻忠贞的意味。

  The company rewards its loyal customers with special discounts every year.

  这家公司每年都会给忠诚的顾客提供特别折扣。

• faithful

  Emphasizes constancy over time and reliability, especially in personal relationships such as marriage or friendship, or a follower or pet remaining devoted; more emotionally warm than loyal.

  强调长期保持的忠贞与可靠，尤其用于婚姻、友情等人际关系，或追随者、宠物始终如一的忠诚；语气比 loyal 更带情感色彩。

  He remained faithful to his wife for fifty years of marriage.

  他与妻子结婚五十年，一直对她忠贞不渝。

True, loyal, and faithful all describe devotion, but differ: true is literary, used in 'true to' a promise. Loyal is the most common, neutral word, for friends, customers, or countries. Faithful stresses constancy over time, in relationships like marriage. Not compared: true meaning 'correct'.

这三个词都表示对某人或某事物忠诚，但语气和适用场合不同：true 语气较文学化，常用于「true to」这类固定搭配（如对承诺、诺言）；loyal 是最常用、最中性的词，可用于人、顾客、国家等；faithful 强调长期保持忠贞与可靠，常用于夫妻、朋友或宠物。这里不比较 true 的「真实的」义项，也不比较 faithful 的「详确的、可靠的」义项（如忠实的译本）。