General Intelligence:
* Perceptive: Having or showing sensitive insight.
* Perspicacious: Having or showing an ability to understand and judge things accurately.
* Prudent: Acting with or showing care and thought for the future.
* Profound: Showing great depth of knowledge or thought.
Specific Skills:
* Practical: Concerned with or relating to actual practice or experience rather than theory.
* Proficient: Competent or skilled in doing something.
* Precise: Marked by exactness and accuracy.
* Penetrating: Able to understand or see through something.
Other Words:
* Poignant: Evoking a keen sense of sadness or regret. (While not directly meaning "smart," it can indicate someone who has a deep understanding of human emotions.)
* Philosophical: Relating to or characterized by philosophy. (Philosophers are known for their intellectual depth.)
Let me know if you'd like me to explore any of these further or provide other options!