Definition of "opacify" []

• Adding a chemical agent to a material, such as rocket propellant, to make it opaque. (verb)
• Adding an extraneous agent or vehicle which, advertently or as a side-effect, makes something opaque. (verb)

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• "While cause for laughter, these manipulations, like Google's systematic search-and-destroy efforts, serve to deaden, opacify, obscure, and delete information."
• "The westering sun slanted in through the window and he didn't bother to push the contact that would opacify the glass."
• "To activate opacify you need to go to the appearance tab of the preference dialog and check in opacify checkbox."