metacognition

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*ḱe?
7. Proto-Indo-European*ḱóm
8. Proto-Italic*kom
9. Proto-Italic*kom-
10. Latincon-
11. Proto-Indo-European*ǵneh₃-
12. Proto-Indo-European*ǵn̥h₃sḱéti
13. Proto-Italic*gnōskō
14. Latingnōscō
15. Latincognōscō
16. Latincognitiō
17. Middle Englishcognicioun
18. Englishcognition
19. English todaymetacognition

From meta- + cognition.