microeconomics

The story

1. Proto-Indo-European*mey-der.?
2. Ancient Greekμῑκρός (mīkrós)
3. Ancient Greekμῑκρο- (mīkro-)
4. Englishmicro-
5. Proto-Indo-European*weyḱ-
6. Proto-Indo-European*wóyḱos
7. Proto-Hellenic*wóikos
8. Ancient Greekϝοῖκος (woîkos)
9. Ancient Greekοἶκος (oîkos)
10. Proto-Indo-European*nem-
11. Proto-Indo-European*németi
12. Proto-Hellenic*némō
13. Ancient Greekνέμω (némō)
14. Ancient Greekνόμος (nómos)
15. Ancient Greekοἰκονόμος (oikonómos)
16. Ancient Greekοἰκονομικός (oikonomikós)
17. Latinoeconomicus
18. Old Frenchiconomike
19. Middle Englishiconomique
20. Middle Englisheconomike, iconomique
21. Englisheconomic
22. Englisheconomics
23. English todaymicroeconomics

From micro- + economics.