IPA: /oʊˈpeɪk.nəs/
KK: /oʊˈpeɪk.nəs/
The quality of not allowing light to pass through; being difficult to see through or understand.
The opaqueness of the glass made it impossible to see inside the room.
Opaqueness → It is formed from "opaque" (from Latin "opacus", meaning shaded or dark) and the suffix "-ness" (meaning the state or quality of). The word "opaqueness" refers to the quality of being opaque or not allowing light to pass through.
Think of the Latin word 'opacus' meaning dark or shaded, which helps you remember that 'opaqueness' describes the quality of being unable to see through something.
No commonly confused words.