This is the 7813th most frequent Chinese word.
阻擋
To block or obstruct.
阻擋 in this sentence is used to indicate stopping or blocking the motion of an object, in this case, a ball.
他用手阻擋了迎面而來的球。
He blocked the incoming ball with his hand.
Here, 阻擋 is used to describe preventing the progression or flow of traffic.
警方設立路障以阻擋交通流量。
The police set up roadblocks to block traffic flow.
In this usage, 阻擋 refers metaphorically to preventing or hindering progress or movement in a figurative sense.