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