It was also dark since the natural light could not penetrate far.

We tried to look through the walls, but didn't penetrate far.

The movement as such did not penetrate far into architecture.

They had not penetrated far into the tunnels the first night.

The soft hallway light didn't penetrate far past the open door.

No Survey people have penetrated this far, and they probably won't for at least fifty years or so.

The sea was cold; the morning sun had not been up long enough for its warmth to penetrate far below the surface.

He could see the stone for hundreds of feet before the light failed to penetrate farther.

There are several roads in the park, but none penetrate far into the interior.

Was the brig about to penetrate far into the bay?