quickscope

The story

1. Proto-Indo-European*gʷeyh₃-
2. Proto-Indo-European*gʷih₃wós
3. Proto-Germanic*kwikwaz
4. Proto-West Germanic*kwiku
5. Old Englishcwic
6. Middle Englishquyk
7. Englishquick
8. Proto-Indo-European*speḱ-
9. Proto-Indo-European*spéḱyeti
10. Proto-Hellenic*sképt͏̌omai
11. Ancient Greekσκέπτομαι (sképtomai)
12. Ancient Greekσκοπός (skopós)
13. Late Latinscopus
14. Italianscopo
15. Englishscope
16. English todayquickscope

From quick + scope.