はな かせる
hanao sakaseru

Ichidan Verb
Idiomatic Expression

1. to enliven (e.g. a conversation); to animate; to engage in enthusiastically

ひさしぶりに ったんだから、酒 さけでも みながら、昔話 むかしばなしにでも はな かせるとするか。
hisashiburini atta ndakara sakedemo nominagara mukashibanashinidemo hanao sakaseruto suruka.
It's been so long since we last met up. Let's have a drink or two and talk about the good old days.
Ichidan Verb
Idiomatic Expression

2. to become successful and well known