こそいだそうだ
刮いだそうだ
kosoida sōda

Godan Verb (gu)
Evidential Auxiliary

Expresses hearsay about a past event ("I heard that...") of こそぐ

1. Apparently scraped off.; They say it was scraped off.

Past/Perfective
Hearsay Evidence
Usually Written in Kana