をふさいだ

blocked

→ を
phrase Rare #36,718
blocked Past tense of ふさぐ, meaning to block, obstruct, cover, or close off something. The を marks what was blocked or covered.
JA: 工事の車が道路をふさいだ。
EN: A construction vehicle blocked the road.

倒れた木が通り道をふさいだ

The fallen tree blocked the path.

落石道路をふさいだ

Falling rocks blocked the road.

部屋がとてもうるさかったのでトムをふさいだ

The room was so noisy that Tom covered his ears.

バスが行くをふさいだ

A bus blocked the way.