thumbscrew

• 名词，有两个义项：一种刑具，用来夹紧拇指；或一种可以用拇指和食指拧动的螺丝。

A noun with two distinct meanings: an instrument of torture that crushes the thumb, or a screw designed to be turned with the thumb and fingers.

1. Instrument of tortureC2formal

   A device used historically to crush the thumb as a form of torture or coercion.

   夹指刑具

   • The prisoner was subjected to the thumbscrew to extract a confession.
   • Thumbscrews were a common tool during the Inquisition.
   • The museum displayed an ancient thumbscrew used in medieval times.

2. Mechanical fastenerC1formal

   A screw with a large head designed to be turned by the thumb and fingers, without needing a tool.

   滚花螺钉

   • He tightened the thumbscrew on the clamp by hand.
   • The device uses a thumbscrew for quick adjustments.
   • You can loosen the thumbscrew to remove the panel.