にぎ んじゃう
nigirikonja u

Godan Verb (mu)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 握り込む

1. To hold onto; To cling to; To hoard; To keep (to oneself); To embrace (and not let go); To regret holding onto

Completed Action
Colloquial