primordial
adjective formal uk/praɪˈmɔː.di.əl/ us/praɪˈmɔːr.di.əl/
（从）太古时代存在的，原始的
existing at or since the beginning of the world or the universe
The planet Jupiter contains large amounts of the primordial gas and dust out of which the solar system was formed. 木星含有大量的原始气体和尘埃，太阳系就是由这些气体和尘埃形成的。
基本的
basic and connected with an early stage of development