Fine tips allow for easy penetration without extensive damage to the cell, but they also correlate with high impedance.

This gives easier penetration with less shattering of the ice.

The head was thick and flared, tapered, perfect for a slow, easy penetration.

Her easy penetration of the hallowed precinct amused rather than alarmed her.

The receptive partner may have to lift the upper knee to allow for easier penetration.

Halloran's easy penetration of Magma's security system the night before had impressed him.

Most condoms are lubricated and they allow less painful and easier penetration.

These hard layers often have platy structure and resist easy penetration by water or plant roots.

A series of gas jets were installed behind the hallway, and the wallpaper was perforated for easy penetration.