Engineers chose a penetrative drill bit to bore through the thick concrete foundation.

The scientists measured the penetrability of the new material before approving it for use in protective gear.

The morning sun penetrates the dusty curtain, scattering motes of light across the room.

She examined the manuscript penetratively, uncovering hidden layers of meaning.

After the merger, the company increased its budget for penetration tests to secure its expanded network.

To free the stuck bolt, she sprayed several different penetrating oils and let them soak overnight.

I sprayed penetrating oil into the rusted hinge to loosen it.

The safety team tested several penetration aids to ensure waterproof seals around the new cable conduits.

To loosen the corroded hinges, I applied penetrating fluids and let them sit overnight.

The missile research team announced it had successfully tested a new penetration aid intended to improve an ICBM warhead's ability to penetrate enemy defenses.