noun
gunnel
GUN-ul/ˈɡʌnl/
The upper edge of a boat's side.
The wooden gunnel runs continuously along the boat's upper side.

Etymology
The supplied evidence treats gunnel as a marine fish, not a boat’s upper edge. It therefore does not establish the historical origin of this nautical sense.
In context
This is a 4.4 m boat with a standard inside gunnel.
More examples
- A rope hangs over the gunnel.
- We fasten the rod holder to the gunnel.
- Both gunnels need a fresh coat of paint.
Forms
gunnel · gunnels
Similar words
- gunwale
- Gunwale is the standard spelling for the same boat edge.