熱(ねつ)

ねつ
noun
fever, heat
medicalhealthscienceemotion
1. fever, temperature
An abnormally high body temperature, usually indicating illness.
熱(ねつ)があります。
I have a fever.
Most common usage
熱(ねつ)が下(さ)がりました。
The fever went down.
Please take my temperature.
I developed a high fever.
I have a slight fever.
2. heat, thermal energy
Warmth or high temperature of physical objects.
I feel the heat of the sun.
This material is sensitive to heat.
熱(ねつ)を加(くわ)える。
To apply heat.
熱(ねつ)が伝(つた)わる。
Heat is transferred.
It gets warm from friction heat.
3. enthusiasm, passion
Intense interest or excitement about something.
My passion for soccer hasn't cooled.
Figurative use
I have enthusiasm for my work.
I spoke with passion.
My enthusiasm for games has cooled.
You can feel their passion for research.

熱(ねつ) can refer to body temperature, physical heat, or emotional passion.

COMMON COLLOCATIONS (medical):

Watch out

熱(ねつ)がある by itself means "to have a fever"; no word for "high" is needed. For hot weather use 暑(あつ)い, and for a hot object 熱(あつ)い, not 熱(ねつ).

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