General Opposites:
* Oblivious: This means lacking awareness or perception.
* Insensitive: This implies a lack of understanding or empathy for others.
* Unobservant: This describes someone who doesn't pay attention to details.
* Uninsightful: This implies a lack of understanding or depth of thought.
* Blunt: This suggests a lack of subtlety or tact.
Specific Opposites:
* Inattentive: If "perceptive" refers to being attentive, the opposite would be inattentive.
* Naive: If "perceptive" refers to being experienced or worldly, the opposite would be naive.
* Uncritical: If "perceptive" refers to being critical and analytical, the opposite would be uncritical.
Ultimately, the best opposite for "perceptive" depends on the specific meaning intended.