The underived concept is fundamental to understanding the theory.

This underivative artwork is truly original.

The concept of consciousness is underivable from physical properties alone.

The concept of consciousness is often considered underivable from physical processes.

She approached the problem underivatively, without relying on any previous solutions.

The professor explained that underivables are words that cannot be derived from other words.

The underivedness of the word can be seen in its unique structure.

She underivedly completed the task.