unbiblical

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. Ancient Greekβῠ́βλος (bŭ́blos)
9. Ancient Greekβυβλίον (bublíon)
10. Ancient Greekβιβλίον (biblíon)
11. Ancient Greekβῐβλῐ́ᾰ (bĭblĭ́ă)
12. LatinBiblia
13. Medieval Latinbiblicus
14. Proto-Indo-European*h₂el-
15. Proto-Indo-European*h₂élisder.?
16. Englishbiblical
17. English todayunbiblical

From un- + biblical.