con ‧ san ‧ guin ‧ i ‧ ty /ˌkɒnsæŋˈɡwɪnəti, ˌkɒnsæŋˈɡwɪnɪti $ ˌkɑːn-/ BrE AmE noun [uncountable] formal
[ Date: 1300-1400 ; Language: Old French ; Origin: consanguinité , from Latin , from com- ( ⇨ COM- ) + sanguis 'blood' ]
when people are members of the same family