consanguinity

n.血缘；血亲；同族

The identity in the primitive society was based on consanguinity. 原始社会存在身份，但这种身份是建立在血缘基础之上的。

The conception of consanguinity and incest could not have anything to do with it, for these things only came much later. 他认为血缘亲属关系的观念和血亲婚配的观念与这毫不相干，因为这只是在很久以后才发展起来的。