heat; thermal energy
Physical heat, as in temperature, cooking, or physics.
夏の暑さで熱がこもる。
Heat builds up in the summer heat.
熱を加えると溶ける。
It melts when heat is applied.
fever; high temperature
Body temperature above normal; often used with ある, 出る, 下がる, etc.
熱があるので、今日は休みます。
I have a fever, so I'll take the day off.
子供の熱が下がらない。
The child's fever won't go down.
zeal; passion; enthusiasm; craze
Intense emotional energy or enthusiasm; also used as a suffix for fads or obsessions (e.g., 〇〇熱).
彼は仕事に熱を入れている。
He puts passion into his work.
最近、キャンプ熱がすごい。
Lately, the camping craze is intense.
When you apply heat to an egg, it solidifies.
I have a fever today, so I'm staying home from school.
The debate gradually became more heated.
My child ran a fever in the middle of the night.
My fever went down after taking medicine.
熱 is the everyday word for a fever or elevated body temperature, while 熱病 specifically names an illness whose defining symptom is high fever.
熱 is the general, everyday word for a fever of any degree, while 高熱 specifically emphasizes that the fever is high.
熱 usually implies an abnormally high temperature (a fever), whereas 体温 is the neutral term for whatever temperature the body currently is.
heating; application of heat
wild enthusiasm; frenzy; craze
zeal; enthusiasm; ardor
generation of heat; heat production · fever; pyrexia
tropics; tropical zone
white heat; incandescence; white glow · heated; excited; climactic
red-hot; scorching heat; burning heat · burning (love); passionate (debate); ardent
ardent; passionate; vehement
hot blood; warm blood · zeal; fervor; enthusiasm; ardor
high fever · intense heat; high temperature
quantity of heat; calorific value · enthusiasm; passion; zeal
thermal insulation; heat insulation
heat; hot air · enthusiasm; excitement; fervor · fever
boiling water; very hot water
heat-resistant; heatproof
passionate love; devotion
heat; heat up · get excited; get worked up; get fired up
geothermal energy; terrestrial heat
ardent wish; burning desire; longing
singing enthusiastically; passionate singing
overheating; excessive heating · superheating (physics) · overheating (figurative); going to excess; running too hot
heat source
tropical fish
light and heat; energy (for lighting and heating)
slight fever; low-grade fever
hot wind; hot air
heat radiation; heat dissipation; radiant heat