"opacifying" in the verb sense
1. opacify
make opaque
"The glass was opacified more greater privacy"
2. opacify
become opaque
"the tissue in the eye's cornea may opacify and the patient may go blind"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License