Propel, as a shell
I believe the answer is:
oar
(Other definitions for oar that I've seen before include "Bladed pole" , "Implement to propel a boat" , "Bladed implement" , "that may be feathered?" , "Use it to move a boat" .)
I believe the answer is:
oar
(Other definitions for oar that I've seen before include "Bladed pole" , "Implement to propel a boat" , "Bladed implement" , "that may be feathered?" , "Use it to move a boat" .)