English: reveal
Welsh: cil
Subject: Ystadau a Cadw
English definition: The sides of a door or window opening which are at 90º to the face of the wall in which the opening sits.
Welsh definition: Ochrau agoriad drws neu ffenestr sy’n 90º o gymharu â wyneb y mur lle gorwedd yr agoriad.
Welsh context: Ffynhonnell: Taflen wybodaeth gyhoeddus Cyngor Gwynedd.