verschwistert verschwistert adj
(miteinander) verschwistert sein to be brother and sister, to be siblings (Sociol, Med etc)
[Brüder] to be brothers
[Schwestern] to be sisters (fig) to be close
[Städte] to be twinned (Brit) or sisters (US) , to be twin towns (Brit) or sister cities (US)
verschwisterte Seelen liter kindred spirits