Japanese word

発熱

Pronunciation

Romajihatsunetsu

Meaning

  • nounfever

Example

弟が発熱しています。otōto ga hatsu netsu shi te i ma su

My younger brother has a fever.

Illustration for 発熱 (fever)

More examples

原因不明の発熱が三日以上続いています。gen in fu mei no hatsu netsu ga mik ka i jō tsuzu i te i ma su

An unexplained fever has lasted for more than three days.

Core concept

It refers to raised body temperature understood as a physical symptom, not simply a feeling of being hot.

Common phrases

  • 発熱があるhatsu netsu ga a ru

    have a fever

Similar words

熱netsu: A raised body temperature or fever referred to in ordinary, less formal speech.

Definition in Japanese

体温が平常の範囲を超えて上がること。tai on ga hei jō no han i o ko e te a ga ru ko to

Word origin

発熱 (hatsunetsu) is formed from the Sino-Japanese elements 発 (hatsu, "give off or start") and 熱 (netsu, "heat"), linking the word to an increase in body heat.

Usage tips

  • In Japanese conversation, 発熱 (hatsunetsu) describes the symptom itself, while a separate word such as 熱 (netsu) can refer to the fever or temperature in a shorter, less formal way.

Opposites

  • 平熱heinetsunormal body temperaturenoun

Related words

  • 発熱性hatsunetsuseipyrogenicitynoun

Word lists with this word