にぎ んだそうだ
nigirikonda sōda

Godan Verb (mu)
Evidential Auxiliary

Expresses hearsay about a past event ("I heard that...") of 握り込む

1. It is said that [someone] monopolized.; It is said that [someone] grasped tightly.; It is said that [someone] held [something] in their hand.

Past/Perfective
Hearsay Evidence