The windows had so much dust they had become opaque.
Which of the following words is an ANTONYM for “opaque” as used in the sentence above?

We can assume from the context clue that the windows were covered in “so much dust” that we would not be able to see through them.
The definition of “opaque” is something not able to let light pass through. The antonym (opposite) of opaque is “transparent,” which describes something that allows light to pass through
“Accessible” refers to something that you can obtain, get or use.
“Circular” refers to something that has the shape of a circle.
“Venetian” refers to something or someone from Venice, Italy.