Old English Synonyms
not able to be seen through; not transparent
The word ‘opac’ is derived from the Latin word ‘opacus’, which means ‘dark, dull, or obscure’. In the context of light andvision, opac refers to the property of a material that allows very little light to pass through it. Opaque materials appear verysolid and impenetrable.
The fog was so thick and opac, I couldn’t see more than a few feet in front of me.
The sky was a beautiful opac blue, and the sun was shining.
The walls in the basement were covered in opac mold.
The opac paint made the room feel smaller and darker.
The opac curtain didn’t provide much privacy.