appurtenance
noun/əˈpɜːtɪnəns/
/əˈpɜːrtɪnəns/
[usually plural] (formal or humorous)- a thing that forms a part of something larger or more importantWord OriginMiddle English: from Old French apertenance, based on late Latin appertinere ‘belong to’, from ad- ‘to’ + Latin pertinere ‘to pertain’.
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appurtenance