The word "thumbscrew" is spelled /ˈθʌm.skruː/ in IPA phonetic transcription. This word is composed of two parts: "thumb," which refers to the largest digit on the hand, and "screw," a mechanical device used for fixing or tightening. The spelling "thumb" includes the consonant sound /th/ and the vowel sound /ʌ/. The spelling "screw" includes the consonant sounds /sk/ and /ruː/. Together, the word "thumbscrew" describes a small instrument made of metal used for inflicting pain or discomfort by crushing the thumbs.
A thumbscrew is a small mechanical device consisting of a threaded cylindrical body and two flat plates on either end, operated manually by screwing and unscrewing. It is used as an instrument of torture or punishment, primarily targeting the fingers or thumbs. The body serves as a shaft with a screw thread running along its length. The plates, one attached to each end, feature holes through which the fingers or thumb can be inserted.
Upon twisting the body of the thumbscrew in one direction, the plates move closer together, causing a compression force to be applied to the fingers or thumb. The tighter the thumbscrew is twisted, the more pressure is exerted on the digits, often leading to severe pain and physical damage. Conversely, turning the thumbscrew in the opposite direction releases the pressure, providing relief.
Historically, thumbscrews have been employed as an interrogation tool or as a method of coercion to extract confessions or information from individuals deemed adversaries or criminals. It became prevalent during times of the Spanish Inquisition and various witch trials throughout history. Today, thumbscrews are primarily utilized as props for theatrical purposes or displayed in museums to represent the cruel practices of the past.
The word "thumbscrew" originates from the Middle English term "Thom scru" which combines "thum" (thumb) and "screwe" (screw). The term first appeared in English texts around the early 17th century. The device itself, known as a thumbscrew, refers to a torture instrument designed to crush and dislocate the fingers or thumb. It consisted of two flat metal plates connected by a screw mechanism that tightened when rotated, causing excruciating pain. Thumbscrews were primarily employed during the medieval and early modern periods as a means of punishment or extracting confessions.