But the aliens were trying to infiltrate and every sentry post was vital.

We have been able to infiltrate most of their organizations.

I can infiltrate and exfiltrate any room on this campus, D. You've seen me do it.

The cancer, instead of appearing as a circumscribed tumor, may infiltrate diffusely the gastric walls, and so escape detection.

Fibrin, or the elements which compose it, also escapes to infiltrate the mucous membrane and remain upon its surface.

They dispatched a scouting party to infiltrate the territory to the north, to watch and wait their chance of capture.

Instruct those of your people who are most cunning, to infiltrate Tamanrasset in the night.

Just infiltrate it with about a hundred smart confidence men and inside a year they'd own everything on it.

As the Latin-quarter element in Brigitte's salon became more rare and less assiduous, a livelier Paris began to infiltrate it.

My answer to him was, "Well, you will have to infiltrate myself, because I am the only one."