I penetrated the security without any help, tapping phone lines, breaking into offices at night.

If you can penetrate without the opposition, then do so.

The lower part was about level with the water, so that we were able to penetrate to the interior without difficulty.

And second, Germany could not penetrate any national borders without that country's permission.

You made sure that every aspect of my life was impossible to penetrate without detection.

I mean we didn't exactly go through the front door, but we did penetrate without too much trouble from the alarm system.

If the attacker can penetrate without the opposition, he should do so.

I do not like to penetrate the thoughts of another without warning.

To penetrate someone else's computer without the owner's consent is punishable by criminal law though.