a dark hole in space
Opaque.
Impenetrable- The fort's defenses were thought to be impenetrable.
source of light and object impenetrable by light
The steel curtain
IMPENETRABLE : unable to be penetrated or breached, impassable, impervious Example : "The concrete dam was an impenetrable obstacle for the fish." The word is used metaphorically for apparently unbeatable blockages or impediments. A book or written form may be "impenetrable" when it cannot be directly understood, or a determined bloc of voters may present an "impenetrable" opposition to an attempt to pass a law.
The phrase "wrapped in an impenetrable mist" could mean that the area is covered in thick fog that you can't see through. If it is being used symbolically, it could mean that an area is undiscovered, or even that someone is unable to think straight (as in "my mind was wrapped in an impenetrable mist").
Impenetrable is more of an Adjective, it's used to describe a trait, or as in Impenetrable, it's describing how something cannot be penetrated. Penetrate itself would be a verb.
The phrase "wrapped in an impenetrable mist" could mean that the area is covered in thick fog that you can't see through. If it is being used symbolically, it could mean that an area is undiscovered, or even that someone is unable to think straight (as in "my mind was wrapped in an impenetrable mist").
No, opaque does not mean thick. Opaque refers to something that does not allow light to pass through, blocking visibility. Thickness, on the other hand, refers to the measurement of how deep or wide an object is.
His skin was impenetrable, Impenetrable means difficult to get through such as a forest or your skin. the forest was impenetrable and it took me hours to get through.
If you mean "light" as in brightness, the word is свет [svet]. If you mean "light" as in lightweight, it's легкий [legkií].
The light in the oven