Percipient (adjective)

Having the ability to perceive or understand things; alert or acute in sensing.

Origin:

Late 16th century: from latin percipere "perceive" + -ent.

Examples:

1. The detective was a percipient observer, noticing even the smallest details.
2. She was a percipient reader, able to understand the author's intended meaning.
3. The percipient judge was able to see through the defendant's lies.
4. His percipient mind was able to grasp complex mathematical concepts quickly.
5. The percipient child was able to sense that something was wrong before anyone else.