'pro-European' originates from the prefix 'pro-' meaning 'in favor of' and 'European,' referring to the continent of Europe or its political entities.

The term 'pro-European' evolved from the combination of 'pro-' and 'European' to describe a political stance favoring European unity.

Initially, it meant 'in favor of Europe,' but over time it evolved to specifically refer to support for European political integration.