What prefix would be added to lysis to mean split using water?

I believe the word is "hydrolysis" so the prefix would be hydro-

On a given microscope, the numerical aperture of the objective is 1.5. The microscope is provided with a filter that selects a wavelength of 500 nm. What is the limit of resolution express in ( µm) of this microscope? Explain what this number means with respect to the dimensions od the cells that you will be able to resolve with this microscope.