perhappenstance

The story

1. Proto-Indo-European*per-der.?
2. Proto-Indo-European*pér
3. Proto-Italic*per
4. Latinper
5. Old Frenchpar
6. Middle Englishper-
7. Proto-Indo-European*kob-
8. Proto-Germanic*hampą
9. Old Norsehapp
10. Middle Englishhap
11. Middle Englishperhap
12. Middle Englishperhappes
13. Middle Englishperhap
14. Middle Englishperhappous
15. Englishperhaps
16. Proto-Germanic*hampą
17. Proto-Germanic*hampijaną
18. Old Norse*happader.?
19. Proto-Germanic*hampijaną
20. Old Norse*heppader.?
21. Old Englishhæppander.?
22. Middle Englishhappen
23. Middle Englishhappenen
24. Englishhappen
25. Englishhappening
26. Proto-Indo-European*(s)ker-
27. Ancient Greekκίρκος (kírkos)
28. Latincircus
29. Latincircum
30. Latincircum-
31. Proto-Indo-European*steh₂-
32. Proto-Indo-European*sth₂éh₁yeti
33. Proto-Italic*staējō
34. Proto-Italic*staēō
35. Latinstō
36. Latincircumstō
37. Latincircumstāns
38. Latincircumstāntia
39. Old Frenchcirconstance
40. Middle Englishcircumstaunce
41. Englishcircumstance
42. Englishhappenstance
43. English todayperhappenstance

Blend of perhaps + happenstance.