Returning back home, you look up diffusion and osmosis on the internet…
Definitions:
Diffusion is a process where molecules move from a high concentration to a low concentration in a given area until equilibrium is reached.
Osmosis is a process where molecules of a solvent, for example water molecules, move from a solution of high concentration of water molecules to a solution of low concentration of water molecules via a semipermeable membrane.
Looking at the definitions you realize that what you are describing is a type of diffusion but because it involves water molecules, it has a different name.
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