Fother
Fother is an old unit for measuring the quantity of lead in England. It was defined in different ways at different places and times, being about equal to a ton or somewhat more.
For further information see Sizes.com.
The word is separately used for covering a leak with a sail containing rope fibres, to prevent it sinking after being damaged.
Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Fother". Image Credit.