(はず)

はずむ
verb (godan)
to bounce; to be lively; to spring
1. to bounce; to spring
For a ball or elastic object to rebound when striking a surface.
ボールがよく(はず)む。
The ball bounces well.
ゴムのボールは(たか)(はず)む。
A rubber ball bounces high.
2. to be lively; to be animated
For conversation, mood, or breathing to become energetic or excited.
会話(かいわ)(はず)んで(たの)しかった。
The conversation was lively and fun.
子供(こども)たちが(はず)んだ(こえ)(はな)している。
The children are talking in lively voices.
(はし)った(あと)(いき)(はず)んでいた。
I was out of breath after running.
(ひさ)しぶりに()ったので(はなし)(はず)んだ。
Since we hadn't seen each other in a while, the conversation was lively.
旅行(りょこう)のことを(かんが)えると(こころ)(はず)む。
My heart leaps when I think about the trip.
3. to be generous; to splurge
To be unusually generous with money, tips, or gifts.
今日(きょう)給料日(きゅうりょうび)だから、チップを(はず)んだ。
Since it's payday, I gave a generous tip.
お祝(いわ)いだからと()って、いつもより(はず)んでくれた。
Saying it was a celebration, he was more generous than usual.

(はず)む is primarily an intransitive verb (自動詞(じどうし)) but can be transitive in sense 3.

ASPECT (ている):
(はず)んでいる indicates something is bouncing or a lively state continues.

PARTICLE PATTERNS:

  • [object]が(はず)む — [object] bounces
  • [conversation/mood]が(はず)む — [conversation/mood] becomes lively
  • [tip/money]を(はず)む — to be generous with [money]

COMMON PATTERNS:

  • ボールが(はず)む (ball bounces)
  • 会話(かいわ)(はず)む (conversation becomes animated)
  • (いき)(はず)む (breathing becomes heavy from exertion/excitement)
  • (こころ)(はず)む (heart leaps with excitement)

IDIOMATIC EXPRESSION:
(いき)(はず)ませて ((こえ)(はず)ませて) means "breathlessly" or "with an excited voice."

SIMILAR WORDS:

  • ()ねる: to jump, leap (more active)
  • (はず)む: to bounce, be lively (includes liveliness)