How to say "flush" in Japanese

• 紅潮こうちょうCommon
  noun, suru verb, intransitive verbCovers the noun-like sense of 'flush' as redness rising in the face, from emotion or heat; it is close to 'blush'. Typical when cheeks redden from embarrassment or drinking.
  彼かれは興奮こうふんして顔かおが紅潮こうちょうした。↗

  He was flushed with excitement.
• 流すながすJLPT N3approx.Common
  godan verb, transitive verbCovers the verb sense 'to flush' in the sense of letting water flow to drain or wash something away. This is really the general 'drain, pour, let flow' verb; 'flush a toilet' is a typical context.
  あんな恐おそろしい男おとこのために流ながす涙なみだはない。↗

  I cannot shed a tear for that horrible man.

Use 紅潮 for the physiological 'flush' of redness in the face, and 「流す」 for the verb sense of flushing away liquid or waste, as with a toilet or draining water.

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

• 紅潮こうちょうflush
• 流すながすto drain
• フラッシュflush (poker hand)
• 火照るほてるto feel hot
• 同一平面上どういつへいめんじょうcoplanar
• 同一平面どういつへいめんflush (with)