conjoint
adjective/kənˈdʒɔɪnt/
/kənˈdʒɔɪnt/
[usually before noun] (formal)- combining all or both the people or things involvedWord OriginMiddle English: from Old French, past participle of conjoindre, from Latin conjungere, from con- ‘together’ + jungere ‘to join’.
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conjoint