Even the name Dao is brilliant. It’s their best attempt at the broadest possible word to express the ground of being:
There is something, amorphous and complete, that was born before heaven and earth.
Obscure, oh and immaterial, oh, it stands alone, unchanged.
It operates everywhere but stays free from danger, thus we may consider it the mother of all under heaven.
We do not know its name.
So we style it Dao
Forced to give it a name, we call it great.
Laozi § 25