わしちゃう
awashichau

Godan Verb (su)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 合わす

1. I'll match (it).; I'll combine (it).; I'll fit (it).; I regret matching (it).; I regret combining (it).; I regret fitting (it).

Completed Action
Colloquial