An example of a rudder is what helps an aircraft direct its course from left to right.
Origin of rudder
- Middle English ruder from Old English rōther steering oar erə- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- Old English rÅÃ¾or (“rudder"), from Proto-Germanic *rÅÃ¾rÄ… (“rudder"; literally, "paddle, instrument for rowing"), from Proto-Germanic *rÅanÄ… "to row" from Proto-Indo-European *ere-, *rÄ“- (“to row") + Proto-Germanic *-Ã¾rÄ…, *-Ã¾raz, instrumental suffix. Akin to Old English rÅwan (“to row"). More at rÅwan, -Ã¾or.