magnetabsorption

The story

1. Ancient GreekΜάγνης (Mágnēs)
2. Ancient Greekμᾰ́γνης (mắgnēs)
3. Old Frenchmagnete
4. Ancient Greekμᾰ́γνης (mắgnēs)
5. Latinmagnēs
6. Middle Englishmagnete
7. Englishmagnet
8. Englishmagnet-
9. Proto-Indo-European*h₂ep
10. Proto-Indo-European*h₂epó
11. Proto-Italic*ap
12. Latinab
13. Latinab-
14. Proto-Indo-European*srebʰ-
15. Proto-Indo-European*srobʰéyeti
16. Proto-Italic*sorβeō
17. Latinsorbeō
18. Latinabsorbeō
19. Latinabsorptiō
20. Englishabsorption
21. English todaymagnetabsorption

From magnet- + absorption; compare magnetoabsorption.