Pristine and Underived

Pristine adjective - Being in an original and unused or unspoiled state.

Underived and pristine are semantically related In some cases you can use "Underived" instead an adjective "Pristine".

Underived adjective - Not derived; primary or simple.

Pristine and underived are semantically related in ancient topic. Sometimes you can use "Pristine" instead an adjective "Underived", if it concerns topics such as earliest.