Opacify is a word that refers to the process of making something opaque or cloudy. There are several synonyms for this word, including cloud, obscure, darken, and murkify. Another term that can be used in place of opacify is "obfuscate," which means to make obscure or unclear. Other synonyms for opacify include blur, fog, veil, and shroud. Each of these words can be used to describe a situation where something was once clear or visible, but is now obscured or difficult to see. Whether it's a foggy morning or a piece of paper covered in smudges, these synonyms can help convey the idea of opacification.