A yett (from the Old English and Scots language word for "gate")[2] is a gate or grille of latticedwrought iron bars used for defensive purposes in castles and tower houses.[3] Unlike a portcullis, which is raised and lowered vertically using mechanical means, yetts are hinged in the manner of a traditional gate or door,[4] and secured by bolts attached to the yett, or by long bars drawn out from the wall or gateway.[5]