The story
- Proto-Germanic*keukô
- Proto-Germanic*kukkaz
- Proto-West Germanic*kokk
- Old Englishcocc
- Middle Englishcok
- Englishcock
- Proto-Germanic*sūkaną
- Proto-West Germanic*sūkan
- Old Englishsūcan
- Middle Englishsouken
- Middle Englishsouker
- Englishsucker
- English todaycocksucker
Etymology from Wiktionary, CC BY-SA 4.0.