rave-hook
/ˈreɪvhʊk/Nautical. Now rare
noun
A tool used for removing oakum from or enlarging the seams in the planking of a ship's deck and sides in preparation for caulking.
Origin
Late 18th century; earliest use found in Boyer's Dictionnaire Royal. Origin uncertain; probably from rave + hook. Compare earlier rive, reave, reave, and ravel.