発熱|はつねつhatsunetsu[0]heiban (flat)

Common
ほつねつhotsunetsuok
Definitions
  1. noun, suru verb, intransitive verbgeneration of heat
  2. noun, suru verb, intransitive verb(attack of) fever; pyrexia
Conjugation
Dictionary form発熱する(はつねつする)
Polite (masu)発熱します(はつねつします)
Negative (nai)発熱しない(はつねつしない)
polite (masen)発熱しません(はつねつしません)
classical zu / nu発熱せず・発熱せぬ(はつねつせず・はつねつせぬ)
Past (ta)発熱した(はつねつした)
polite (mashita)発熱しました(はつねつしました)
Past negative (nakatta)発熱しなかった(はつねつしなかった)
polite (masen deshita)発熱しませんでした(はつねつしませんでした)
Te form発熱して(はつねつして)
Potential発熱できる(はつねつできる)
Passive発熱される(はつねつされる)
Causative発熱させる(はつねつさせる)
Causative passive発熱させられる(はつねつさせられる)
Conditional (ba)発熱すれば(はつねつすれば)
tara発熱したら(はつねつしたら)
Volitional発熱しよう(はつねつしよう)
polite (mashou)発熱しましょう(はつねつしましょう)
Imperative発熱しろ(はつねつしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonym熱発ねっぱつCasualColloquial term heard in medical settings for running a fever; 「発熱」 is the formal term in medicine and physics.
  • Related熱のある状態NeutralA descriptive phrase for the state of having a fever; in everyday speech you would simply say 「熱がある」.
  • Antonym平熱へいねつNeutralThe normal body temperature of a healthy person — the opposite of 「発熱」 in the sense of having a fever.

Use 「発熱」 for fever in medical contexts and for objects generating heat, as in 「発熱外来」 and 「発熱体」. In everyday speech say 「熱がある」; medical staff colloquially say 「熱発」. The opposite is 「平熱」, a normal temperature.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 物体ぶったいが熱ねつを発はっする反応はんのう。
  2. 病気びょうきなどで体温たいおんが上あがること。
Kanji in this word
See also

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