むすぶそうだ
kirimusubu sōda

Godan Verb (bu)
Evidential Auxiliary

Expresses hearsay ("I heard that...") of 切り結ぶ

1. It is said they are...; Apparently they are...; I heard they are...; ; (cutting/resolving/concluding) a tie/conflict/matter.

Hearsay Evidence