blindside

verb
UK /ˈblaɪndsaɪd/
US /ˈblaɪndsaɪd/

To surprise someone by attacking or tricking them from a direction they are not watching.

The defender was blindsided by a player rushing from behind.


OTHER MEANINGS

2. To hit someone from their blind side, the area they cannot see.

The quarterback was blindsided by a fast pass rusher.

3. To give someone a sudden shock with news they did not expect.

The company blindsided its workers with news of the closure.

4. The side of something that is hard to see or hidden from view.

The house's blindside faced the woods, so nobody saw the broken window.