These words all describe sb/sth that has a low temperature.以上各词均表示温度低。
coldhaving 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(oftenapproving) 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。
freezingextremely 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(ratherinformal) 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(oftendisapproving) 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(oftendisapproving) 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.
➤unfriendly不友好🔑(ofaperson人) withoutemotion; unfriendly冷漠的；不友好的◆togivesbacoldlook/stare/welcome冷冷地看某人一眼/瞪着某人/迎接某人◆Hermannerwascoldanddistant. 她的态度冷漠而疏远。◆Hewasstaringatherwithcoldeyes. 他用冷漠的眼光盯着她。➤light/colours光线；颜色🔑seemingtolackwarmth, inanunpleasantway冷的；冷色的；寒色的◆clearcoldlight清寒的光◆coldgreyskies冷灰色的天空➤route路径noteasytofind不易发现的◆Thepolicefollowedtherobberstotheairportbutthenthetrailwentcold. 警察追踪抢劫犯到了机场，但是后来却失去了他们的踪迹。➤ingames游戏usedinchildren'sgamestosaythatthepersonplayingisnotclosetofindingapersonorthing, ortoguessingthecorrectanswer（儿童游戏中）离目标远的，未猜中的➤unconscious失去知觉out~[not before noun](informal) unconscious失去知觉◆Hewasknockedoutcoldinthesecondround. 他在第二轮中被击倒，失去了知觉。➤facts事实the~facts/truthfactswithnothingaddedtomakethemmoreinterestingorpleasant真实的；客观的➡ see alsocoldly, coldness●acoldˈfishapersonwhoseemsunfriendlyandwithoutstrongemotions冷漠无情的人●get/havecoldˈfeet(informal) tosuddenlybecomenervousaboutdoingsththatyouhadplannedtodo临阵胆怯；畏缩◆Hewasgoingtoaskherbuthegotcoldfeetandsaidnothing. 他本来是想问她的，可事到临头他却胆怯得什么也没有说。●givesbthecoldˈshoulder(informal) totreatsbinanunfriendlyway冷漠对待；使受到冷遇➡ see alsocold-shoulder●incoldˈbloodactinginawaythatisdeliberatelycruel; withnopity残忍地；蓄意地；冷酷地；无情地◆tokillsbincoldblood残忍地杀害某人●inthecoldlightofdaywhenyouhavehadtimetothinkcalmlyaboutsth; inthemorningwhenthingsareclearer有时间冷静考虑时；在头脑更清醒些的第二天早晨◆Thesethingsalwayslookdifferentinthecoldlightofday. 这些事情在冷静地考虑后总会显得不同。●leavesbˈcoldtofailtoaffectorinterestsb未打动某人；无法引起某人的兴趣◆Mostmodernartleavesmecold. 大多数的现代艺术引不起我的兴趣。●pour/throwcoldˈwateronsthtogivereasonsfornotbeinginfavourofsth; tocriticizesth泼冷水；批评；责备●makesb'sbloodruncoldtomakesbveryfrightenedorfillthemwithhorror使某人不寒而栗（或毛骨悚然）●blowhotandˈcold (aboutsth)(informal) tochangeyouropinionaboutsthoften拿不定主意；出尔反尔●gohotandˈcoldtoexperienceasuddenfeelingoffearoranxiety突然感到害怕（或焦虑）◆WhenthephonerangIjustwenthotandcold. 电话铃响时我吓得一阵冷一阵热。
