Japanese · Body & Health
熱
netsu
Fever / Heat
Intermediatenoun
Definition
An abnormally high body temperature, often indicating illness. Also means heat or warmth in general, as in 熱いお湯 (hot water). 熱がある (netsu ga aru) means "to have a fever."
Example
昨夜から熱があります。
I have had a fever since last night.
Etymology
熱 (netsu) has its roots in ancient medical terms in Japanese, relating to the sensation of heat and illness. It reflects the traditional understanding of health and wellness.
How & Where It’s Used
熱 is used in both spoken and written contexts, primarily formal when discussing health. It is easily recognized throughout Japan, especially in medical settings.