1. the quality or state of being inseparable; the condition of being unable to be separated or divided
Usage: abstract noun form of inseparable; formal register

Examples

• The inseparableness of the two concepts made it difficult to study them independently.
• Their friendship was marked by an inseparableness that lasted throughout their lives.
• The inseparableness of form and content in poetry is a key principle in literary criticism.
• Scientists recognized the inseparableness of matter and energy in modern physics.
• The inseparableness of rights and responsibilities is fundamental to citizenship.