What does the Anglo-Saxon root tw means?

The Anglo-Saxon root "tw" is related to the concept of two. It's found in words like:

* Twain: meaning two

* Twin: meaning two of the same kind

* Twelve: meaning two and ten

* Twenty: meaning two tens

* Twice: meaning two times

The root "tw" reflects the ancient concept of using "two" as a base for counting and structuring language. It shows up in various Germanic languages and has influenced English vocabulary.