How to say "rudder" in Japanese

• 舵かじCommon
  nounThe native word for a boat's rudder, also covering the helm. It is what you use in ordinary talk about steering a vessel.
• ラダーCommon
  nounThe katakana loanword from English 'rudder', denoting the same device as 舵. It fits technical contexts, where the borrowed term is the natural way to refer to a rudder.

For the rudder or helm of a boat, 舵 is the ordinary native word; 「ラダー」 is the katakana loanword for the same device, used in technical contexts.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 舵かじrudder
• ラダーrudder
• 方向舵ほうこうだrudder