(はず)

はずみ
noun
momentum; impetus; bounce; spur of the moment
1. momentum; impetus; driving force
The force or energy that keeps something moving forward or accelerating. Used for both physical and figurative momentum.
仕事(しごと)(はず)みがつく。
Work gains momentum.
成功(せいこう)(はず)みとなって、(つぎ)のプロジェクトも順調(じゅんちょう)(すす)んだ。
The success served as momentum, and the next project also progressed smoothly.
この勝利(しょうり)をチームの(はず)みにしたい。
I want to use this victory as a springboard for the team.
2. impulse; spur of the moment; chance occurrence
An unplanned action triggered by a sudden impulse or coincidence. Often used with に or で to mean 'on impulse' or 'by chance.'
(はず)みで()ってしまった。
I blurted it out on impulse.
(さけ)(はず)みで余計(よけい)なことを(はな)した。
Carried away by the drink, I said things I shouldn't have.
ぶつかった(はず)みに()っていたコップを()としてしまった。
When I bumped into something, the impact made me drop the cup I was holding.

The noun form of the verb (はず)む (to bounce, to spring). The core image is of a bouncing, springing force — something that propels forward or triggers an action.

COMMON COLLOCATIONS:

  • (はず)みがつく: to gain momentum
  • (はず)みをつける: to build up momentum
  • (はず)みで: on impulse; by the force of
  • (はず)みとなる: to serve as a springboard
  • (さけ)(はず)みで: carried away by drink

SIMILAR WORDS:

  • (いきお)い: vigor, force, momentum (broader; can describe ongoing energy)
  • 衝動(しょうどう): impulse, urge (stronger emotional drive, often for sense 2)
  • きっかけ: trigger, opportunity (emphasizes the starting point rather than the force)