metafictional

The story

1. Proto-Indo-European*me
2. Proto-Indo-European*meth₂?
3. Ancient Greekμετᾰ́ (metắ)
4. Ancient Greekμετᾰ- (metă-)
5. Englishmeta-
6. Proto-Indo-European*dʰeyǵʰ-
7. Proto-Indo-European*dʰinéǵʰti
8. Proto-Italic*θingō
9. Proto-Italic*fingō
10. Latinfingō
11. Latinfictiō
12. Old Frenchficcion
13. Middle Englishficcioun
14. Englishfiction
15. Proto-Indo-European*h₂el-
16. Proto-Indo-European*h₂élisder.?
17. Englishfictional
18. English todaymetafictional

From meta- + fictional.