primaeval，英语单词，主要用作形容词，作形容词时译为“原始的；远古的（等于primeval）”。
单词用法
柯林斯英汉双解大词典
primaeval /praɪˈmiːvəl/
1.ADJ You use primaeval to describe things that belong to a very early period in the history of the world. 原始的 [正式][usu ADJ n]
2.ADJ You use primaeval to describe feelings and emotions that are basic and not the result of thought. (情感)原始的; 基本的; 不假思索的 [usu ADJ n]
短语搭配
primaeval world 原古世界