penetrating

Able to pierce or penetrate

The skunk produces a penetrating odor.

As the rest of the film was made on location in the railway yards of Havre and not in a studio, and was given a sound-track of penetrating vividness, this whole production gives the closest possible ring of truth of any film about railways.

Looking deeply into; piercing

He had a very penetrating pair of brown eyes.

Demonstrating acute or keen understanding

His novel shows a penetrating insight into the criminal mind.