pressurize

(verb) increase the pressure on a gas or liquid. Synonyms: supercharge, pressurise.

(verb) maintain a certain pressure. Synonyms: pressurise. Examples: "The airplane cabin is pressurized." "Pressurize a space suit."

(verb) increase the pressure in or of. Synonyms: pressurise. Example: "The captain will pressurize the cabin for the passengers' comfort."