Earliest and Pristine

Earliest adjective - Coming before all others in time or order.

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

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

Earliest and pristine are semantically related in clean topic. You can use "Earliest" instead an adjective "Pristine", if it concerns topics such as original.