打診 だしん
dashin

Noun
Suru Verb

1. percussion; tapping; examining by percussion

Transitive
Medicine
Noun
Suru Verb

2. sounding out (someone's intentions); making an approach (about)

Transitive
かれ打診 だしんして、賛成 さんせいしてくれるかどうか たしかめてみなさい。
kareni dashin shite sansē shite kureruka dōka tashikamete minasai.
Try sounding him out and see if he'll come around.