vent
/ˈvent/
verb
to provide with a vent
to serve as a vent for
discharge, expel
noun
an opening for the escape of a gas or liquid or for the relief of pressure: such as
the external opening of the rectum or cloaca : anus
pipe, fumarole
noun
a slit in a garment; specifically : an opening in the lower part of a seam (as of a jacket or skirt)