1) A cauldron or other vessel made of some kind of metal, used for boiling water or other liquids over a fire. Such vessels could be of considerable size.
1453 10 fulles ketilles , Hull
1476 una olla enuea et una debile pan’ sive ketell, York
1505 de Edwardo Kirkeby a ketyll , York
1571 Item 3 kettles, 4 little pans and a basin 12s , Elmswell: 1600 one litle ketle which is bound with iron which will hould to the quantitye of two gallonnes , Knaresborough
1700 one keettell which is sett in a furness & 2 ranges , Brayton.