system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is water incompressible ?

While we're at it, why does google chrome think incompressible isn't a word?
gpt
Actually, water is just really, really difficult to compress.  The molecules are already so close together, it's hard to squeeze them any tighter without them being in constant "contact".  

(Contact is technically incorrect, but it's close enough for this discussion.)

This is different from a gas, where there is plenty of empty space in which to wiggle around.