1. Having or composed of only one thing, element, or part.
2. Not involved or complicated; easy.
3. Being without additions or modifications.
4. Having little or no ornamentation; not embellished or adorned.
5. Unassuming or unpretentious; not affected.
6. Having or manifesting little sense or intelligence.
7. Not guileful or deceitful; sincere.
8. Ordinary or common.
9. Being a fundamental or rudimentary element.