pressurize (Verb) — Increase the pressure on a gas or liquid.
pressurize (Verb) — Maintain a certain pressure. ex. "the aeroplane cabin is pressurized" ex. "pressurize a space suit"
pressurize (Verb) — Increase the pressure in or of. ex. "The captain will pressurize the cabin for the passengers' comfort"
pressurize (Verb) — Put pressure on someone (to do something).