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.
The fortress walls were impenetrable, standing strong against any attempts of intrusion.
His shield was made of an impenetrable material.
A sentence punctuated as a whole sentence is a compound sentence. This is taught in 3rd grade.
A sentence that asks a question is called an interrogative sentence.
a transitory sentence is a type of sentence that you can write.
In this sentence is the prepositional phrase in that sentence.
Impenetrable- The fort's defenses were thought to be impenetrable.
His shield was made of an impenetrable material.
The man had impenetrable metal skin, incapable of being pierced.
The professor's heavy accent made the substance of his lecture nearly impenetrable.
Around six o'clock, I'll have a great answer for you. Around the fort, our cordon was impenetrable.
Bwindi Impenetrable National Park was created in 1991.
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.
impenetrable
The area of Bwindi Impenetrable National Park is 331 square kilometers.
Opaque.
Diamond
The steel curtain