てば ひび
uteba hibiku

Godan Verb (ku)
Expression

1. to be responsive; to show immediate results

かれはいいね。打 てば ひびくようにすぐ うごいてくれるよ。
karewa iine. uteba hibiku yōni sugu ugoite kureruyo.
He's a good kid - very quick on the uptake and he does whatever needs to be done.