venting

This term is defined in ECSS-E-ST-35C Rev. 1 as
opening a closed volume to the ambient with the objective of decreasing the pressure in the volume

This term is defined in ECSS-E-ST-33-01C as
compensation of the internal mechanism pressure environment with its surrounding pressure environment

This term is defined in ECSS-Q-ST-70-01C as
conveying unwanted gaseous products through an aperture