2. Table salt. This is the most common kind of salt, and the one most used in the our kitchen. Sourced from salt mines, it is then refined and most minerals removed. Anti-caking agents are added to prevent clumping, as is iodine, a nutrient not always naturally present in salt.
Opaque is from a Latin word meaning dark, and that was its original sense in English, but it now means literally not transparent or metaphorically hard to understand; unclear: Some of his sentences are really opaque..
A paint color is said to be opaque when it hides what's underneath it, when you can't see any or much of what's beneath the color. Some pigments are extremely opaque, such as titanium white and cadmium red; other pigments are semi-opaque, such as zinc white.