Wiktionary
depressurise
vb. (label en British spelling) (alternative spelling of depressurize English)
WordNet
depressurise
v. decrease the pressure of; "depressurize the cabin in the air plane" [syn: depressurize, decompress] [ant: pressurize, pressurize]
Usage examples of "depressurise".
He must check the suit, depressurise the capsule, and open the hatch - which, luckily, was almost full-length.
Rather than climb back up the dorsal airlock they depressurised the cab and dropped out of the side hatch.