Why diffusion pressure of pure solvent is higher then it's solution plse explain it clearly.

Each liquid has a specific diffusion pressure. Pure water or a pure solvent has the maximum diffusion pressure.

If some solute dissolved in it, the water or solvent in the resulting solution comes to attain less diffusion pressure than that of the pure water or pure solvent. In other words, diffusion pressure of a solvent, in a solution is always lower than that in the pure solvent.

'The amount by which the diffusion pressure of water or solvent in a solution is lower than that of pure water or solvent is known as diffusion pressure deficit (DPD)'.