Wiktionary
beginningless
a. 1 incomplete for lack of a beginning. 2 eternal; uncreated; having always existed.
Usage examples of "beginningless".
After all, they and everything they do have their causes which stem from beginningless time.
So, I was made by genes then, which come from beginningless time, and are not made by parents.
Therefore a creative thought, such as you speak of, is an appearance only, and has necessarily existed since beginningless time.
Now the mountains were getting that pink tinge, I mean the rocks, they were just solid rock covered with the atoms of dust accumulated there since beginningless time.