熱: hot; to warm; fervent

熱 [热] rè

adjective
: hot (of weather); heat
: to warm up; to heat up
: fervent; zeal

熱い | あつい atsui

adjective
: hot (thing)

熱す | ねす nesu

godan verb with su ending | intransitive verb
: to get a fever

熱さ | あつさ atsusa

noun
: heat (of a thing)

熱め | あつめ atsume

no-adjective
: hot

熱れ | いきれ ikire

noun
: steamy, very warm temperature

熱り | ほてり hoteri

noun | no-adjective
: a glow; heat
: burning sensation; hot flash

熱[热]情 re4qing2: cordial; enthusiastic; passion; passionate; passionately
[熱情 | ねつじょう netsujou: ardor]

熱門 [热门] re4 men2: popular; hot; in vogue

熱氣 [热气] re4qi4: steam; heat
[熱気 | ねっき nekki: heat; hot air; enthusiasm
OR ねつけ netsuke: feverish]

熱[热]烈 re4lie4: enthusiastic; ardent; warm
[熱烈 | ねつれつ netsuretsu: ardent; passionate; vehement]

熱愛 [热爱] re4’ai4: to love ardently; to adore
[熱愛 | ねつあい netsuai: love passionately; ardent love; devotion]

熱鬧 [热闹] re4nao: bustling with noise and excitement; lively

熱[热]心 re4xin1: enthusiasm; zeal; zealous; zest; enthusiastic; ardent; warmhearted
[熱心 | ねっしん nesshin: zeal; enthusiasm]

親熱 [亲热] qin1re4 : affectionate; intimate; warm-hearted

加熱[热] jia1re4 : to heat
[加熱 | かねつ kanetsu: heating; application of heat]

悶熱 [闷热] men1re4: sultry; sultriness; hot and stuffy; stifling hot

炎熱[热] yan2re4: blistering hot; sizzling hot (weather)
[炎熱 | えんねつ ennetsu: sweltering heat]

發熱 [发热] fa1 re4: to have a high temperature; feverish; unable to think calmly; to emit heat

Japanese common word | expression | yojijukugo 四字熟語 | idiom | proverb
熱々 | あつあつ atsu atsu
: piping hot
: passionately in love

頭寒足熱 | ずかんそくねつ zukan sokunetsu
: (yoji) keeping the head cool and feet warm

喉元過ぎれば熱さを忘れる | のどもとすぎればあつさをわすれる
nodo moto sugireba atsusa o wasureru
: (proverb) danger past and God forgotten; once on shore, we pray no more; once it’s past the throat, one forgets the heat (of the swallowed object)

*鉄は熱い内に鍛えよ | てつはあついうちにきたえよ tetsu wa atsui uchi ni kitaeyo
: Strike while the iron is hot

Chinese expression | chengyu 成語 | idiom
熱乎乎 [热乎乎] re4 hu1 hu1
: nice and warm

湊熱鬧 [凑热闹] cou4 re4 nao5
: to join in the fun; to get in on the action; (fig.) to butt in; to create more trouble

熱氣騰騰 [热气腾腾] re4 qi4 teng2 teng2
: piping hot

熱淚盈眶 [热泪盈眶] re4 lei4 ying2 kuang4
: eyes brimming with tears of excitement; extremely moved

熱情款待 [热情款待] re4 qing2 kuan3 dai4
: to provide warm hospitality

熱情洋溢 [热情洋溢] re4 qing2 yang2 yi4
: brimming with enthusiasm; full of warmth

熱火朝天 [热火朝天] re4 huo3 chao2 tian1
: in full swing; (in a) frenzy; buzzing with activity

熱炒熱賣 [热炒热卖] re4 chao3 re4 mai4
: lit. to sell hot food freshly cooked; fig. to teach what one has just learned; enthusiasm of the new convert

忽冷忽熱 [忽冷忽热] hu1 leng3 hu1 re4
: now hot, now cold; (of one’s mood, affection etc) to alternate

冷嘲熱諷 [冷嘲热讽] leng3 chao2 re4 feng3
: frigid irony and scorching satire; to mock and ridicule

水深火熱 [水深火热] shui3 shen1 huo3 re4
: deep water and scorching fire; abyss of suffering

打得火熱 [打得火热] da3 de5 huo3 re4
: to carry on intimately with; ardent relationship (esp. between lovers); billing and cooing

炙手可熱 [炙手可热] zhi4 shou3 ke3 re4
: lit. burn your hand, feel the heat; arrogance of the powerful; a mighty figure no-one dares approach; hot (exciting or in favor)

生炒熱賣 [生炒热卖] sheng1 chao3 re4 mai4
: to sell while it’s still hot; fig. in a great hurry to publish or sell (and no time to improve the product)

*趁熱打鐵 [趁热打铁] chen4 re4 da3 tie3
: to strike while the iron is hot

熱鍋上的螞蟻 [热锅上的蚂蚁] re4 guo1 shang5 de5 ma3 yi3
: (like) a cat on a hot tin roof; anxious; agitated

心急吃不了熱豆腐 [心急吃不了热豆腐] xin1 ji2 chi1 bu5 liao3 re4 dou4 fu5
: hasty men don’t get to eat hot tofu; one just has to be patient; haste will ruin everything

冰炭不言，冷熱自明 [冰炭不言，冷热自明] bing1 tan4 bu4 yan2 , leng3 re4 zi4 ming2
: ice or coals, whether hot or cold goes without saying; fig. sincerity is not expressed in words

內行看門道，外行看熱鬧 [内行看门道，外行看热闹] nei4 hang2 kan4 men2 dao5 , wai4 hang2 kan4 re4 nao5
: while the connoisseur recognizes the artistry, the layman simply enjoys the show

老婆孩子熱炕頭 [老婆孩子热炕头] lao3 po2 hai2 zi5 re4 kang4 tou5
: wife kids and a warm bed; the simple and good life; longa est vita si plena est; la dolce vita