The compressibility of a substance is its ability to deform upon the application of force. Liquids are not compressible under normal circumstances.
Why do Liquids Not Compress Easily Under Normal Circumstances
What Happens When a Liquid is Compressed
Summary
Example of Incompressibility of Water Imagine squeezing a water balloon. Water takes whatever shape the balloon takes. Suppose the inside pressure is high. Since water does not compress easily, the balloon will not take the pressure any longer. It will burst, and water will come out.
