To Bounce
intransitive verb, godan verb
Weird that this kanji means bullet but the verb vocab version means to bounce. Just imagine someone shooting a bullet. What does it do when it hits the right materials? It's going to bounce.
はずむ
If you're going to bounce something off that wall, it has (はず) to be made of rubber, otherwise it will just go right through. It has to.
彼との会話がこんなに弾むなんて、思ってもみなかったわ。
I never expected such a lively conversation between the two of us.