After all, I want to be sure the sun can't penetrate by day.

It had penetrated southern Ireland by the early 5th century.

People can only penetrate the mysteries by the exercise of faith.

The enemy tanks penetrated the forward position by 0900 hours.

There would be no way to penetrate this citadel by force.

In turn, those services may be - and some have been - penetrated by identity thieves.

The sword point only needed to penetrate Austin's defense by a few inches to kill him.

Soviet forces were already penetrating deep into Manchukuo by that time.

Life forms of an organic nature had penetrated the ship by an unknown means.

His great deed, however, had been to penetrate the pack by sail alone.