thumbscrew

== English == === Alternative forms === thumb-screw, thumb screw === Etymology === From thumb + screw. === Pronunciation === IPA(key): /ˈθʌmskɹuː/ === Noun === thumbscrew (plural thumbscrews) A screw that is designed to be turned with the thumb and fingers, thus requiring no screwdriver or spanner (wrench). Coordinate terms: thumbwheel; wing nut; handwheel An instrument of torture used to crush the fingers. Synonym: pilliwinks (figuratively) A weakness that can be taken advantage of. ==== Translations ====