You searched for: “opacities”
opacity (s) (noun), opacities (pl)
1. A thick or dark condition that makes something; such as, glass or a liquid difficult to see through: The opacity of Shareen's windows were a result of not having the accumulation of dirt cleaned off.
Opacities represent the degrees to which light is obscured by pollutant particles in the air.2. Having difficulty in understanding statements, presentations, or in explaining something: Students had difficulty in understanding the opacity of the teacher's scientific presentation.
The opacities of most dictionaries simply don't give people clear or straightforward definitions.3. Etymology: "darkness, obscurity", from French opacité; from Latin opacitatem, opacitas, "shade, shadiness"; from opacus, "shaded, dark".