inseparable
adjective
[ ɪnˈsɛp(ə)rəb(ə)l ]
• unable to be separated or treated separately.
• "research and higher education seem inseparable"
• (of a prefix) not used as a separate word or (in German) not separated from the base verb when inflected.
inseparable
noun
• a person or thing inseparable from another.
Origin:
late Middle English: from Latin inseparabilis, from in- ‘not’ + separabilis (see separable).
