The story
- Proto-Germanic*keukô
- Proto-Germanic*kukkaz
- Proto-West Germanic*kokk
- Old Englishcocc
- Middle Englishcok
- Englishcock
- Proto-Indo-European*swep-
- Proto-Indo-European*supnós
- Proto-Hellenic*húpnos
- Ancient Greekὕπνος (húpnos)
- Ancient Greekὑπνόω (hupnóō)
- Ancient Greekὕπνωσις (húpnōsis)
- Englishhypnosis
- English todaycocknosis
Etymology from Wiktionary, CC BY-SA 4.0.