とし んだそうだ
otoshikonda sōda

Godan Verb (mu)
Evidential Auxiliary

Expresses hearsay about a past event ("I heard that...") of 落とし込む

1. It is said that [someone] talked [someone else] into it.; It is said that [someone] persuaded [someone else] to do it.; It is said that [someone] convinced [someone else] to do it.

Past/Perfective
Hearsay Evidence