Translation guide
In Japanese, expressing 'fever' depends on whether you mean a medical symptom (body temperature), a state of intense excitement, or a metaphorical 'heat'. The most common word is 熱 (netsu), which covers both literal fever and passionate enthusiasm.
To say someone has a fever or to describe a high body temperature due to illness.
The standard word for fever. Used in phrases like 'have a fever' or 'the fever goes down'.
A more formal or medical term for 'fever' or 'onset of fever'. Often used in written contexts or medical settings.
I have symptoms of fever.
Literally 'body temperature is high'. A more descriptive way to say someone has a fever, often used in medical contexts.
I have a high temperature, so I'll rest.
Specifically means 'high fever'. Used when the fever is severe.
I'm laid up with a high fever.
To describe a state of intense excitement, passion, or craze, often metaphorically.
Means 'wild enthusiasm' or 'frenzy'. Used for crowds, fans, or a general atmosphere of excitement.
The spectators went wild with excitement at the soccer match.
The same word as medical fever, but used metaphorically for passion or enthusiasm. Often in compounds.
Loanword from English, used for a temporary craze or boom, often in media or entertainment.
To refer to a historical or metaphorical 'fever' for a resource or trend, like a gold rush.
Directly borrowed from English 'gold rush'. Used for historical gold rushes or metaphorically for any sudden opportunity.
The California Gold Rush began in 1848.
Suffix meaning 'fever for ~'. Attach to a noun to indicate a craze or boom. E.g., 投資熱 (investment fever), 不動産熱 (real estate fever).
Lately, the cryptocurrency fever is intense.
While 熱 (netsu) is the standard word for medical fever, it can also mean 'heat' or 'passion'. Context is key. For example, 熱い (atsui) means 'hot' (to the touch), not 'feverish'.
彼は仕事に熱を入れている。
He puts his heart and soul into his work.
あのアイドルは今フィーバー中だ。
That idol is all the rage right now.