Learn how to say Opaquenesses correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word opaque:
adjective (opaquer, opaquest)
not able to be seen through; not transparent:
bottles filled with a pale opaque liquid
(especially of language) hard or impossible to understand:
technical jargon that was opaque to her
an opaque thing.
[mass noun] Photography a substance for producing opaque areas on negatives.
late Middle English opake, from Latin opacus ‘darkened’. The current spelling (rare before the 19th century) has been influenced by the French form