Impenetrably

The speaker's accent made his speech impenetrably unintelligible.

The legal jargon used in the contract was impenetrably complex.

The subject matter was impenetrably esoteric and specialized.

The code for the program was impenetrably encrypted.

The air was impenetrably humid, making it difficult to breathe.

The novel was impenetrably complex, with many intertwined storylines.

The car was impenetrably packed with luggage, leaving little room for passengers.

The market was impenetrably crowded with people, making it hard to navigate.

The textbook was impenetrably difficult to read.

The traffic was impenetrably congested on the highway.

The formation of the rocks was impenetrably compact, making it difficult for geologists to study them.

The protesters impenetrably shouted slogans outside the government building.

The museum exhibit was impenetrably dimly lit, and it made it hard to appreciate the artwork.

The alleyway was impenetrably dark, and we were worried about our safety.

The basement was impenetrably dark, and I was scared to go down there.

The room was impenetrably dim, and I couldn't see anything.

The chilled drink was impenetrably cold to the touch.