Why is water basically incompressible? Are there squishy liquids?

[AaronX]

@Machine_Elf

Yes. This is why pressure vessels (e.g. SCUBA air tanks, rated for ~2000 psi) are often subjected to hydrostatic testing (instead of compressed-gas testing): they fill it with water and then apply pressure. If the vessel ruptures during the pressure test, there’s far less energy released than if compressed gas were used.

That’s what I was thinking. Compressing to the same volume change, however, is a different matter.