The state or characteristic of being childish.
Childish behaviour.
Lack of sharpness of mind; lack of ability to think using complex ideas; stupidity
Lack of subtlety or abstruseness; clarity
Lack of artificial ornament, pretentious style, or luxury; plainness
Lack of complication; efficiency.
The quality or state of being not complex, or of consisting of few parts
The quality or state of being unmixed or uncompounded