agonistes
/ˌaɡəˈnɪstiːz/adjective
Used postpositively as an epithet with proper names: who is an agonist, engaged in a struggle or combat.
- Chiefly after the title of Milton's poem..
Origin
Late 17th century; earliest use found in John Milton (1608–1674), poet and polemicist. From ancient Greek ἀγωνιστής.