to pin down; to knock down; to push (and hold) someone down (esp. with sexual connotations)
強風が道路沿いの木を押し倒した。
The strong wind pushed down the trees along the road.
ラグビー選手は相手を押し倒して、見事トライを決めた。
The rugby player pushed down his opponent and scored a splendid try.
相手を押し倒すのは危険だ。
It is dangerous to push down an opponent.