The ur-heroes fought bravely against the enemy.

The Ur-races are ancient civilizations that existed long before recorded history.

The ur-texts provide valuable insights into the origins of literature.

The ur-forms of these words are different.

My Ur-ancestors came from a small village in ancient Mesopotamia.

There are various ur-types in the world of programming.

The ur-words are essential for understanding the concept.

The ur-text of the novel provides valuable insights into the author's original intentions.

The ur-sources of this information are reliable.

The library is the ur-source of knowledge.