Simple: This is a general opposite, indicating something straightforward and uncomplicated.
Basic: Similar to "simple," this emphasizes the lack of detail or complexity.
Rudimentary: This implies a bare minimum, lacking refinement or development.
Plain: This suggests a lack of embellishment or ornamentation.
Sparse: This emphasizes a lack of detail or information, often suggesting a feeling of emptiness.
Concise: This focuses on brevity and directness, the opposite of being drawn-out or detailed.
Uncomplicated: This is a more general term for something easily understood and not complex.
Straightforward: This highlights the direct and clear nature of something, the opposite of being intricate or complex.
Direct: This emphasizes the lack of roundaboutness or embellishment, contrasting with the elaborateness of something.
The best choice for you depends on the specific situation and the nuance you want to convey.