沸騰|ふっとうfuttou[0]heiban (flat)

JLPT N1approx.Common
Definitions
  1. noun, suru verb, intransitive verbboiling; seething
    水みずは摂氏せっし100度どで沸騰ふっとうする。↗
    Water boils at 100 degrees Celsius.
    水みずは充分じゅうぶんに加熱かねつすると沸騰ふっとうする。↗
    Water will boil if heated enough.
  2. noun, suru verb, intransitive verbbecoming heated (e.g. of a debate); excitement; agitation; fermentation
    The country seethed over the issue of national defense.
  3. noun, suru verb, intransitive verbsoaring (of prices); shooting up
Conjugation
Dictionary form沸騰する(ふっとうする)
Polite (masu)沸騰します(ふっとうします)
Negative (nai)沸騰しない(ふっとうしない)
polite (masen)沸騰しません(ふっとうしません)
classical zu / nu沸騰せず・沸騰せぬ(ふっとうせず・ふっとうせぬ)
Past (ta)沸騰した(ふっとうした)
polite (mashita)沸騰しました(ふっとうしました)
Past negative (nakatta)沸騰しなかった(ふっとうしなかった)
polite (masen deshita)沸騰しませんでした(ふっとうしませんでした)
Te form沸騰して(ふっとうして)
Potential沸騰できる(ふっとうできる)
Passive沸騰される(ふっとうされる)
Causative沸騰させる(ふっとうさせる)
Causative passive沸騰させられる(ふっとうさせられる)
Conditional (ba)沸騰すれば(ふっとうすれば)
tara沸騰したら(ふっとうしたら)
Volitional沸騰しよう(ふっとうしよう)
polite (mashou)沸騰しましょう(ふっとうしましょう)
Imperative沸騰しろ(ふっとうしろ)

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

Synonyms & antonyms
  • Synonym沸くわくNeutralEveryday intransitive verb: water comes to a boil, or a hall erupts in excitement; 「沸騰」 is the Sino-Japanese term, also used figuratively.
  • Related煮立つにたつNeutralBoiling, mainly in cooking; 「沸騰」 is about the physical phenomenon.
  • Related煮えるにえるNeutralFood being boiled until cooked through; 「沸騰」 is about the liquid itself boiling.
  • Related沸かすわかすNeutralTransitive: to boil water or heat a bath, also to get a crowd fired up; 「沸騰」 is a noun.
  • Related煮沸しゃふつWrittenWritten/formal: heating water etc. to a boil, often to sterilize; 「沸騰」 is about a liquid reaching its boiling point, also public opinion boiling over.
  • Related煮えくり返るにえくりかえるNeutralMostly figurative: seething with rage; 「沸騰」 stays objective, covering the physical process or public opinion.
  • Related煮えたぎるにえたぎるNeutralA vigorous rolling boil with an intense feel; 「沸騰」 is the plainer, objective description.
  • Related煮え立つにえたつNeutralComing to a boil, also figurative for flying into a rage; 「沸騰」 covers the physical process and public opinion.
  • RelatedたぎるWrittenLiterary: water seething and rushing, or blood boiling with passion; 「沸騰」 is the more objective term.
  • Related煮え返るにえかえるNeutralBoiling and rolling over, also figurative for seething anger; 「沸騰」 is the more objective term.
  • Related煮立てるにたてるNeutralTransitive: to boil or simmer something, mainly in cooking; 「沸騰」 names the phenomenon itself.
  • Related湯煮ゆにWrittenWritten word for boiling in hot water, rarely used; 「沸騰」 centers on reaching the boiling point.
  • RelatedたぎらすWrittenTransitive and literary: to bring a liquid to a boil; 「沸騰」 is a noun.
  • Antonym凝固ぎょうこNeutralAntonym: solidification — a liquid turning solid, the opposite of 「沸騰」 as the boiling of a liquid.
  • Antonym凍結とうけつNeutralAntonym: freezing, the opposite of 「沸騰」; also used for freezing assets.

Use 「沸騰」 for a liquid reaching its boiling point or for opinion and popularity surging, as in 「お湯が沸騰する」「人気沸騰」「議論が沸騰する」. To bring water to a boil say 「沸かす」; the water itself 「沸く」. Heating to a boil, often to sterilize, is 「煮沸」; boiling blood is 「滾る」; the opposite is 「凝固」.

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

Japanese definitions
  1. 気化きかが、液体えきたいの表面ひょうめんからだけでなく内部ないぶからも激はげしく発生はっせいすること。
  2. 沸き立わきたつように盛り上もりあがること。騒然そうぜんとなること。
Kanji in this word
English equivalents

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

Say it right, write it right

Core lookup works fully offline, with cloud pronunciation and one-tap save & review. Free, no sign-up.

Free downloadWindowsFree downloadmacOSDownload on the App StoreGet it on Google Play
MobileiOS / Android

Android

QR code for the Google Play pageGet it on Google Play

Scan it with your Android phone to install, or search for “Tomoshi” on Google Play.

iOS

QR code for the App Store pageDownload on the App Store

Scan it with your iPhone camera to install, or search for “Tomoshi” in the App Store.

Install the browser extensionLook words up on any web page · Chrome / Edge / Safari

Screenshot of a Tomoshi lookup resultScreenshot of Tomoshi lookup results on a phone

Windows macOS Chrome / Edge / Safari extension iOS / Android