Akademik

To pierce; to pass into the deeper tissues or into a cavity.

pen·e·trate 'pen-ə-.trāt vb, -trat·ed; -trat·ing vt

1) to pass into or through <enzymes that help the sperm \penetrate the zona pellucida (Anna Maria Gillis)>

2) to insert the penis into the vagina of in copulation vi to pass, extend, pierce, or diffuse into or through something <penetrating percutaneous nephroscopy or ureteroscopy (R. A. Riehle )(et al)>