aspiration
bleeding
bloodletting
broaching
cleaning out
clearance
clearing
cupping
defecation
depletion
discharging cargo
drafting
drainage
draining
drawing
egress
elimination
evacuation
excretion
exhausting
exhaustion
milking
off-loading
phlebotomy
pipetting
pumping
removal
siphoning
sucking
suction
tapping
unloading
venesection
venting
voidance
voiding
yeast
remotion
drain