English: sash weight
Welsh: pwysau ffenestr
Subject: Ystadau a Cadw
English definition: A piece of lead or iron which counterbalances the sliding sash window, by means of sash cords and pulleys. 
Welsh definition: Darn o blwm neu haearn sy’n gwrthbwyso’r ffenestr godi, drwy ddefnyddio cyrt ffenestr a phwlïau. Hefyd defnyddir ‘llygoden’.
Welsh context: Ffynhonnell: Taflen wybodaeth gyhoeddus Cyngor Gwynedd.