unconstraining

The story

1. Proto-Indo-European*né
2. Proto-Indo-European*n̥-
3. Proto-Germanic*un-
4. Proto-West Germanic*un-
5. Old Englishun-
6. Middle Englishun-
7. Englishun-
8. Proto-Indo-European*ḱe?
9. Proto-Indo-European*ḱóm
10. Proto-Italic*kom
11. Proto-Italic*kom-
12. Latincōn-
13. Proto-Indo-European*streyg-
14. Proto-Indo-European*strinégti
15. Proto-Italic*stringō
16. Proto-Indo-European*strengʰ-
17. Proto-Indo-European*stréngʰeti
18. Proto-Italic*strengō
19. Latinstringō
20. Latincōnstringō
21. Old Frenchconstreindre
22. Middle Englishconstreinen
23. Englishconstraining
24. English todayunconstraining

From un- + constraining.