How to say "diminishing" in Japanese

• 先細りさきぼそりCommon
  noun, suru verb, intransitive verb, na-adjectiveCovers the dwindling sense of 'diminishing': something that starts out substantial and gradually thins away, such as attendance, sales, or enthusiasm. The image is of something growing thinner toward its end.
• 減殺げんさいCommon
  noun, suru verb, transitive verbMatches 'diminishing' as an action performed on something: lessening or reducing it in amount or degree. It is not the word for something that simply dwindles away over time; use 先細り for that.

Choose 「先細り」 for something that gradually dwindles or tapers off over time, such as attendance, sales, or interest; choose 減殺 for the act of lessening or reducing something — its amount or degree.

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

• 先細りさきぼそりdwindling
• 減殺げんさいlessening
• 損減そんげんdecreasing
• 減音げんおんdiminishing (chord, interval)