Rudder (noun)

A flat piece of wood or metal attached to the stern of a boat or ship and used for steering.

Origin:

Late middle english: from old french roudere, from roder 'to steer', from latin rotare 'to rotate'.

Examples:

1. The rudder was an essential part of the ship for navigation.
2. The rudder was attached to the tiller and used to steer the vessel.
3. The rudder was a critical component in controlling the direction of the boat.
4. The rudder was damaged in a storm, making it difficult to steer the ship.
5. The rudder was used by sailors to change the course of the ship in rough waters.