沸かす|わかすwakasu[0]heiban (flat)

1. godan verb, transitive verbto boil; to heat (a liquid); to prepare (a bath, hot drink)
   ジェシーはコーヒーを入いれる為ためにお湯ゆを沸わかしている。↗

   Jessie is boiling water to make coffee.
2. godan verb, transitive verbto excite; to rouse; to stir
   相手あいてチームがあまり闘志とうしをわかしていなかったので、我々われわれは楽勝らくしょうした。↗

   The opposing team did not put up much of a fight, so we won hands down.

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

• Synonym煮沸しゃふつWrittenWritten/formal prose: heating water etc. to a boil, typically for sterilizing, as in 「煮沸消毒」. Not the everyday word for boiling water.
• SynonymボイルCasualColloquial loanword for boiling food in water, as in 「ボイルした海老」; mostly heard in cooking contexts.
• Related沸騰ふっとうNeutralA noun for boiling — also of opinion or debate boiling over — usable in any register, as 「沸騰する」. 「沸かす」 is the transitive verb.
• Related煮立つにたつNeutralIntransitive: soup or broth bubbling up to a boil, as in 「鍋が煮立つ」.
• Related煮えるにえるNeutralSaid of food cooking through, as in 「芋が煮える」; the point is doneness, not the act of boiling water.
• Related沸くわくNeutralIntransitive: describes the water coming to a boil or getting hot; 「沸かす」 is the transitive counterpart, used for the person who heats it.
• RelatedボイルCasualColloquial loanword for boiling food in water, as in 「ボイルした海老」; mostly heard in cooking contexts.
• Related煮えくり返るにえくりかえるCasualColloquial. Often figurative for seething with rage, as in 「はらわたが煮えくり返る」.
• Related煮えたぎるにえたぎるWrittenWritten/formal prose: boiling hard or at a rolling boil, as in 「煮えたぎる湯」.
• Related煮立てるにたてるNeutralTransitive: bringing soup or broth to a boil, as in 「だしを煮立てる」.
• Related煮え立つにえたつWrittenWritten/formal prose, intransitive: coming to a boil, or anger welling up, as in 「怒りで煮え立つ」.
• RelatedたぎるWrittenWritten/formal prose: boiling over, or passion surging, as in 「血が滾る」.
• RelatedたぎらすWrittenWritten/formal prose, transitive: bringing a liquid to a rolling boil. Rare in daily use; say 「沸かす」 instead.
• Related煮え返るにえかえるWrittenWritten/formal prose: boiling and rolling, or being furious; mostly figurative for anger.
• Related湯煮ゆにWrittenWritten/formal prose: boiling food in hot water, as in 「湯煮した野菜」; a cooking term, not for boiling water itself.
• Antonym冷ますさますNeutralThe opposite of 「沸かす」: letting something hot cool down, as in 「お茶を冷ます」.
• Antonym冷やすひやすNeutralThe opposite of 「沸かす」: chilling or refrigerating, as in 「ビールを冷やす」.

To boil water or heat a bath, say 「沸かす」; its intransitive partner is 「沸く」. For soup, use 「煮立てる」 (transitive) or 「煮立つ」 (intransitive); for sterilizing, 「煮沸」; for cooking food in water, 「ボイル」. The literary verbs 「煮えたぎる」「煮え立つ」「煮え返る」「滾る」 describe violent boiling or seething anger. To cool something, use 「冷ます」 or 「冷やす」.

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

1. 水みずなどを煮え立にえたたせる。
2. 金属きんぞくを溶とかす。
3. 多おおくの人ひとを熱狂ねっきょうさせる。