Home › Words › O › opacifyopacifyopacify means to make opaque.EtymologyBack-formation from opacification, ultimately from Latin opācus (“dark”); equivalent to opaque + -ify.verbTo make opaque.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.opacate 86% match — To darken; to cloud. vs opacify →opacating 86% match — Making or becoming opaque. vs opacify →opacification 86% match — The action of making something opaque or cloudy. vs opacify →opacous 72% match — Not shining or illuminated; dark. vs opacify →opacious 70% match — Opaque. vs opacify →opacular 70% match — opaque vs opacify →obscurate 70% match — To obscure. vs opacify →opacifier 69% match — a chemical agent added to a material, such as rocket propellant, to make it opaque vs opacify →