pintle

n. 枢轴, 舵栓, 牵引挂钩

pin.tle

n.（名词）
A pin or a bolt on which another part pivots.
枢轴，柱销，扣针：在另一铆钉上的扣针或销子
Nautical The pin on which a rudder turns.
【航海】 舵栓：牵引桨的部分
The pin on which a gun carriage revolves.
炮架枢轴：炮架转动用的枢轴
A hook or a bolt on the rear of a towing vehicle for attaching a gun or trailer.
牵引挂钩：一种挂钩或轴，可在拖车后装炮或拖斗

来源：
Middle English pintel
中古英语 pintel
from Old English [penis]
源自 古英语 [阴茎]