United by growth, naturally joined together. Paul writes in Romans 6:5 that 'if we have become united with him in the likeness of his death, we shall also be in the likeness of his resurrection.' The word suggests organic unity, like plants grafted together that grow into one. It can mean congenital or innate in medical contexts, but Paul uses it for mystical union with Christ. Baptism into Christ's death creates a living connection: believers grow together with Christ through participation in his death and resurrection pattern.