If you wedge something, you force it to remain in a particular position by holding it there tightly or by sticking something next to it to prevent it from moving. 把…楔住; 把…抵牢
I shut the shed door and wedged it with a log of wood.
a piece of wood, rubber, metal, etc. with one thick end and one thin pointed end that you use to keep a door open, to keep two things apart, or to split wood or rock 楔子；三角木
He hammered the wedge into the crack in the stone.
他用锤子把楔子砸入石缝里。
(figurative)
I don’t want to drive a wedge between the two of you (= to make you start disliking each other).
我不想在你们俩中间挑起不和。