noun
wooden horse (torture/SM device)
A triangular wooden device historically used for torture and now associated with BDSM play. The term is niche and may not be widely known outside specific contexts.
中世の拷問具として三角木馬が使われた。
The wooden horse was used as a medieval torture device.
SMプレイで三角木馬が使われることがある。
A wooden horse is sometimes used in SM play.
Compound of 三角 (triangle) and 木馬 (wooden horse), describing the shape and material of the device.