These words all describe sb/sth that has a low temperature. 以上各词均表示温度低。

• cold having a temperature that is lower than usual or lower than the human body; (of food or drink) not heated; cooled after being cooked 指寒冷的、冷的，（食物、饮料）凉的、冷的：◆I'm cold. Turn the heating up. 我觉得冷，把暖气温度调高一点。◆Outside it was bitterly cold. 外面非常寒冷。◆a cold wind 寒风◆hot and cold water 热水和凉水◆It's cold chicken for lunch. 午餐有鸡肉冷盘。
• cool (often approving) fairly cold, especially in a pleasant way 指凉爽的、凉快的：◆a long cool drink 一大口冷饮◆We found a cool place to sit. 我们找了一个凉快的地方坐下来。
• freezing extremely cold; having a temperature below 0° Celsius 指极冷的、冰冻的、冰点以下的：◆It's absolutely freezing outside. 外面冷得不得了。◆I'm freezing! 我要冻僵了！
• chilly (rather informal) too cold to be comfortable 指寒冷的、阴冷的：◆Bring a coat. It might turn chilly later. 带件大衣，过一会儿天气可能会变冷。
• lukewarm (often disapproving) slightly warm, sometimes in an unpleasant way 指微温的、不冷不热的、温吞的：◆Her coffee was now lukewarm. 她的咖啡变得微温。
• tepid (often disapproving) slightly warm, sometimes in an unpleasant way 指微温的、不冷不热的、温吞的：◆a jug of tepid water 一壶温水

lukewarm or tepid? 用 lukewarm 还是 tepid？

• There is really no difference in meaning or use between these words. 以上两词在含义和用法上无实际区别。

Patterns

• to feel/get cold/cool/chilly
• cold/cool/freezing/chilly air/weather
• a cold/cool/freezing/chilly wind
• cold/cool/freezing/lukewarm/tepid water
• a cold/cool/lukewarm/tepid shower/bath
• cold/lukewarm/tepid tea/coffee/food
• a cold/cool drink
• It's cold/chilly/freezing outside.