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rudderstock

American  
[ruhd-er-stok] / ˈrʌd ərˌstɒk /
Or rudder stock

noun

Nautical.
  1. the vertical member at the forward edge of a rudder, hinged at the sternpost and attached to the helm or steering gear.


Etymology

Origin of rudderstock

First recorded in 1860–65; rudder + stock