the degree to which a substance prevents light from passing through it, often used in scientific contexts, particularly in astronomy

in a more metaphoric sense, it can refer to the lack of clarity or transparency in situations or arguments

साफगोई की कमी

English Usage: The stellar opacity of his explanation left everyone confused about his intentions.

Hindi Usage: उसकी व्याख्या की साफगोई की कमी ने सभी को उसकी मंशाओं के बारे में confused किया।