Etymology

Noun

1. A struggle or contest; conflict; especially between the protagonist and antagonist in a literary work.
2. A test of will; a conflict

   “Freud's originality stemmed from his aggression and ambition in his agon with biology” (Harold Bloom).

3. A contest in ancient Greece, as in athletics or music, in which prizes were awarded.
4. A two-player boardgame played with a hexagonally-tiled board, popular in Victorian times. Also known as queen's guard.