(しり)すぼみ

しりすぼみ
noun
fizzling out; tailing off; petering out
1. fizzling out; tailing off; petering out; anticlimactic ending
Something that starts strong but gradually weakens, diminishes, or loses momentum toward the end. Literally describes something that narrows toward the rear.
計画(けいかく)(しり)すぼみになった。
The plan fizzled out.
議論(ぎろん)(しり)すぼみに()わった。
The discussion ended in an anticlimactic way.
最初(さいしょ)()()がったが、後半(こうはん)(しり)すぼみになってしまった。
It was exciting at first, but the second half fizzled out.

Composed of (しり) (rear end, bottom) + すぼみ (narrowing, contracting, from すぼむ). Literally describes something that tapers off toward the end, like a shape that narrows at its base.

USAGE:
Typically used with になる (to become) or に()わる (to end). Carries a negative connotation — implies disappointment that something did not maintain its initial energy.

COMMON COLLOCATIONS:

  • (しり)すぼみになる: to fizzle out, to peter out
  • (しり)すぼみに()わる: to end in an anticlimax
  • (しり)すぼみの結果(けっか): an anticlimactic result

SIMILAR EXPRESSIONS:

  • 竜頭蛇尾(りゅうとうだび): a strong start with a weak ending (a four-character idiom meaning "dragon head, snake tail")
  • 中途半端(ちゅうとはんぱ): halfhearted, incomplete — different nuance, emphasizes incompleteness rather than tapering off

CONTRAST:
有終(ゆうしゅう)() (finishing beautifully) is the opposite sentiment — ending on a high note.