Self-evident, intuitively obvious.
Presumed without analysis.
Based on hypothesis and theory rather than experiment or empirical evidence.
Developed entirely from scratch, without deriving it from existing languages.
In a way based on theoretical deduction rather than empirical observation.
Not showy; undemonstrative.
Not busy, of low quantity.
Not talking much or not talking loudly; reserved.
With little or no sound; free of disturbing noise.
Requiring little or no interaction.
Having little motion or activity; calm.
Be quiet.
To become quiet or calm.
To cause (someone or something) to become quiet.
The absence of sound; quietness.
The absence of movement; stillness, tranquility.
The absence of disturbance or trouble; peace, security.