All gullible antonyms
gul·li·ble
G g adj gullible
- astute — If you describe someone as astute, you think they show an understanding of behaviour and situations, and are skilful at using this knowledge to their own advantage.
- discerning — showing good or outstanding judgment and understanding: a discerning critic of French poetry.
- knowledgeable — possessing or exhibiting knowledge, insight, or understanding; intelligent; well-informed; discerning; perceptive.
- perceptive — having or showing keenness of insight, understanding, or intuition: a perceptive analysis of the problems involved.
- unbelieving — not believing; skeptical.
- untrusting — inclined to trust; confiding; trustful: a trusting child.
- wise — having the power of discerning and judging properly as to what is true or right; possessing discernment, judgment, or discretion.
- suspicious — tending to cause or excite suspicion; questionable: suspicious behavior.