pilliwinks
(ˈpɪlɪˌwɪŋks) or pilniewinks
pl n (Historical Terms) a medieval instrument of torture for the fingers and thumbs
[C14: of uncertain origin]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014