There is no way for black to effectively block all these threats.

But, he said, the real estate industry has effectively blocked the bill.

Even a small number of defenders could effectively block an advance.

However, some areas have access effectively blocked by private owners for a long distance.

The landowners fear the state's action will effectively block their rights to build there.

And the river behind them, too deep to ford, effectively blocked their retreat.

Alternatively, it is generally possible to effectively block half of the field.

My room was quiet, and the curtains effectively blocked the early morning light.

It was one of the most effectively blocked roads the sergeant had ever seen.

That effectively blocks the nomination from being voted on by the full Senate.