How to say "emit" in Japanese

• 発するはっするCommon
  suru verb (irregular), transitive verbCovers producing or letting out something, especially sounds, cries, signals, or light. Typical when a device or a person gives off a warning sound or emits a signal.
  そのバラは甘あまい匂においを発はっする。↗

  The rose gives off a sweet odor.
• 吐くはくJLPT N3approx.Common
  godan verb, transitive verbCovers sending out or breathing out air, smoke, or breath from the body. Typical when a smoker exhales smoke or a person lets out a sigh.
• 吐き出すはきだすCommon
  godan verb, transitive verbCovers breathing out or blowing out air, or spewing out smoke. Stronger than 吐く, suggesting something forced or expelled outward in quantity.
  アイスランドには大量たいりょうの煙けむりを吐き出はきだしている火山かざんがあります。↗

  There's a volcano emitting masses of smoke in Iceland.

Use 「発する」 for producing or letting out things such as sounds, signals, or light; use 「吐く」 or 「吐き出す」 for sending out air, smoke, or similar from inside, with 「吐き出す」 more forceful.

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

• 発するはっするto let out
• 噴くふくto emit
• 吐くはくto emit
• 放つはなつto emit (e.g. light)
• 吐き出すはきだすto breathe out (e.g. air)
• 吹くふくto emit (smoke, fire, etc.)