Erstwhile and Unoriginal

Erstwhile adjective - Having been such at some previous time.

Unoriginal and erstwhile are semantically related. In some cases you can use "Unoriginal" instead an adjective "Erstwhile".

Unoriginal adjective - Using or marked by the use of something else as a basis or model.

Erstwhile and unoriginal are semantically related. Sometimes you can use "Erstwhile" instead an adjective "Unoriginal".