| observer |
| trenchant(adjective, astute, patent, observable) |
| critical(adjective, sharp, sensitive, piercing, astute) |
| conscious(adjective, understanding, cool, sound, keen) |
| insightful(adjective, understanding, cool, keen, sharp) |
| knowing(adjective, understanding, keen, sharp, sensible) |
| quick(adjective, understanding, cool, keen, sharp) |
| sage(adjective, understanding, cool, keen, sharp) |
| sound(adjective, sensible, rational, intelligent, thoughtful) |
| understanding(noun, adjective, keen, sensible, certain) |
| bright(adjective, cool, sharp, significant, sensitive) |
| clear |
| knowledgeable(adjective, understanding, cool, keen, sharp) |
| perceiver |
| politic |
| prudent(adjective, reasoning, intellectual, mental) |
| quick-witted(adjective, cool, smart, significant, intelligent) |
| rational(adjective, understanding, sound, keen, sharp) |
| reasonable(adjective, sound, sensible, rational, practical) |
| sensitive(adjective, understanding, keen, sharp, perceptive) |