invade

1 - The skin provides a barrier against invasion from outside organisms and protects underlying tissues from injury.

2 - Angiography, which involves injecting a radiopaque substance into an artery, is the most invasive of all kidney imaging procedures and is reserved for special situations, such as when a doctor must evaluate the blood supply to the kidneys.

3 - The bodies of most people simply ignore pollen, but others treat pollen as a foreign invader.

4 - Most infectious diseases are caused by microorganisms that invade the body and multiply there.

5 - Malignant tumors can invade and destroy surrounding tissue.