Perceptive (adjective)

1. Having or showing a quick and delicate appreciation of others' feelings.
2. Having or showing the ability to notice and understand things that are not obvious.

Origin:

Late 16th century: from french perceptif, -ive or latin perceptivus, from percept- "caught, seized", from the verb percipere.

Examples:

1. She is a perceptive observer of human behavior.
2. He has a perceptive understanding of the market.
3. She is a perceptive listener.
4. He is a perceptive critic of art.
5. She is perceptive when it comes to people's needs.