Ship's blades (9)
I believe the answer is:
propeller
(Other definitions for propeller that I've seen before include "It rotates to push against air or water" , "Mechanical device" , "attachment on aircraft" , "Driver" , "Screw (on a boat)" .)
I believe the answer is:
propeller
(Other definitions for propeller that I've seen before include "It rotates to push against air or water" , "Mechanical device" , "attachment on aircraft" , "Driver" , "Screw (on a boat)" .)