General Antonyms:
* Unsophisticated: This is the most direct opposite.
* Naive: Implies a lack of experience or knowledge.
* Simple: Can refer to a lack of complexity or refinement.
* Crude: Suggests a lack of refinement or elegance.
* Uncultured: Implies a lack of knowledge or appreciation for art, literature, etc.
More Specific Antonyms:
* Basic: If "sophisticated" refers to complexity, "basic" is the opposite.
* Primitive: If "sophisticated" refers to technology, "primitive" is the opposite.
* Unrefined: If "sophisticated" refers to manners or behavior, "unrefined" is the opposite.
Example:
* Sophisticated: A person who is well-traveled and knowledgeable about different cultures.
* Unsophisticated: A person who has never left their hometown and has limited experience with the world.
The best antonym to use depends on what specific aspect of "sophisticated" you are trying to contrast.