Use 'impenetrably' to describe places or things that are visually hard to get through.

Visual Context

'Impenetrably' often refers to a physical barrier that cannot be easily passed.

Physical Barrier

It suggests something so intense it overwhelms the senses, making penetration seem impossible.

Sensory Intensity

'Impenetrably' can imply a challenge to the intellect due to complexity or abstraction.

Intellectual Challenge

Although it sounds negative, 'impenetrably' can signal depth and richness in academic or literary contexts.

Not Always Negative

Using 'impenetrably' in academic writing suggests deep expertise but can also alienate readers if overused.

Academic Tone

 It's true that some sections are impenetrably dense at first glance, but it's up to the reader to let their eyes skim over them or break out a shovel and dig in. And once you start excavating the text, you'll find the book to be an encyclopedic treasure trove.