lukewarm

Compared meaning: a temperature that is not hot or cold (adjective).

比较义项：温度适中、微温（形容词，形容不冷不热的温度）。

• warm

  Describes a temperature that feels pleasant and comfortable, neither too hot nor too cold; used broadly for weather, clothing, food or touch, and always carries a positive, desirable feel.

  指一种令人感到舒适宜人的温度，不太热也不太冷；可用于天气、衣物、食物或触感，且总是带有积极、令人愉悦的意味。

  He pulled on a warm sweater before heading out into the cold evening.

  他在寒冷的夜晚出门前穿上了一件暖和的毛衣。

• lukewarm 本词

  Means only slightly warm, especially when something has cooled down or never got hot enough; carries a disappointed tone and is often used figuratively for a half-hearted reaction, such as a lukewarm welcome.

  指“只是微温”，尤其用于本该更热却冷却下来或根本没热透的东西；带有令人失望的语气，也常用于比喻，形容不冷不热、敷衍的反应，如冷淡的欢迎。

  The crowd gave the band a lukewarm reception after the encore.

  安可结束后，观众对乐队的反应相当冷淡。

• tepid

  Also means only slightly warm, very close to lukewarm in meaning, but sounds more formal or literary and is most often used for liquids such as water or coffee rather than in figurative expressions.

  同样表示“只是微温”，意思与 lukewarm 十分接近，但语气更正式、更书面，多用来形容水、咖啡等液体，较少用于比喻表达。

  The bathwater had gone tepid by the time she finally got in.

  等她终于进去洗澡时，洗澡水已经变得微温了。

Warm, lukewarm, and tepid all describe a temperature between hot and cold, but warm feels pleasant and positive. Lukewarm and tepid mean only slightly warm, and sound disappointing. Lukewarm is often figurative, like a lukewarm welcome; tepid is more literary, used for liquids.

这三个词都形容“不冷不热”的温度，但 warm 指令人舒适、宜人的温度，是积极正面的感觉；lukewarm 和 tepid 则指“只是微温”，通常暗示温度不够高，带有令人失望的意味，二者含义几乎相同——lukewarm 更常用于比喻义（如态度冷淡），tepid 更偏书面语，多用来形容液体。这里不比较 warm 表示“热情友好”（如 warm welcome）等其他引申义。