penetrating
/ˈpɛnɪtɹeɪtɪŋ/ adjective C1- Able to pierce or penetrate · The skunk produces a penetrating odor.
- 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.
From the library
There were a number of letters, bills, and notebooks, which Holmes turned over and examined with quick, nervous fingers and darting, penetrating eyes.
The youth looked at us with a very penetrating and, as it seemed to me, unfriendly gaze.
He had a deep-set, penetrating eye, almost buried beneath the thick gray eyebrow, and a long (and still black) beard reaching down to his breast.
Faria bent on him his penetrating eye.
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