warm

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 本词

  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

  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。

Compared meaning: enthusiastic, very keen on something (adjective).

比较义项：热情、热衷（形容词）。

• crazy

  Informal, hyperbolic, and used predicatively as 'crazy about' + noun; suggests an intense, almost irrational passion, often about a hobby, trend, or celebrity.

  非正式、语气夸张，常用“crazy about+名词”表示对某事（如爱好、潮流或明星）近乎疯狂的强烈热情。

  She's crazy about K-pop and never misses a new album release.

  她对韩流音乐十分狂热，新专辑发行从不错过。

• warm 本词

  Describes friendly, welcoming enthusiasm shown toward people in social situations, not toward a hobby or activity; used before nouns like 'welcome', 'smile', or 'reception'.

  表示在社交场合中对人表现出的友善、热情，而不是对某项爱好或活动的热衷；常用在“welcome”“smile”“reception”等名词前。

  The mayor gave the visiting delegation a warm welcome at the town hall.

  市长在市政厅热情地欢迎了来访代表团。

• avid

  Formal and used attributively before a noun (an avid reader/collector); describes steady, serious enthusiasm for an ongoing interest or activity, without hyperbole.

  语气正式，常用在名词前作定语（如avid reader/collector），形容对某项长期爱好或活动持续、认真的热情，没有夸张色彩。

  My uncle is an avid collector of vintage stamps and rare coins.

  我叔叔是一位热衷收藏老式邮票和稀有硬币的人。

All three express strong enthusiasm. Crazy is informal, an almost irrational passion for a hobby. Warm shows friendly enthusiasm toward people, not a hobby. Avid is formal, before a noun, showing steady interest in an activity. Excludes crazy as 'mentally ill', warm as 'hot'.

这三个词都能表达强烈的热情，但语气和用法不同：crazy非正式、夸张，强调近乎疯狂的痴迷；warm强调待人友善、热情，用于欢迎、微笑等场合而非某项爱好；avid语气正式，多用于名词前，形容对爱好持续认真的投入。这里不比较crazy表示“疯狂的、精神失常的”的义项，也不比较warm表示“温暖的（温度）”的义项。