If "profound" means deep or intense:
* Superficial: This implies a lack of depth or seriousness.
* Shallow: Similar to superficial, indicating a lack of substance.
* Trivial: Emphasizing insignificance or lack of importance.
* Simple: Contrasting with complexity or intricacy.
If "profound" means insightful or wise:
* Naive: Lacking experience, wisdom, or understanding.
* Superficial: Again, this suggests a lack of depth in thought or understanding.
* Uninformed: Lacking knowledge or awareness.
* Foolish: Lacking good judgment or understanding.
If "profound" means deeply felt or emotional:
* Indifferent: Showing a lack of interest or concern.
* Superficial: This implies a lack of genuine feeling or connection.
* Detached: Not emotionally connected or involved.
* Lighthearted: Characterized by a lack of seriousness or weight.
The best antonym will depend on the specific meaning of "profound" in the context you're considering.