means A device or action that moves liquid, gas, or air from one place to another by mechanical pressure or suction — or, by extension, the heart, a fuel station, or the act of forcing something repeatedly.

from From Middle Dutch and Low German 'pompe,' likely echoing the sloshing, sucking sound of the thing itself — an imitative word that spread across the seafaring languages of northern Europe before settling into English around the 15th century, when sailors needed to bail out their ships.