estopping

It is a great pity that just now political conditions are completely estopping wild-life protection in Mexico; but it is true.

Our Vanishing Wild Life Its Extermination and Preservation William Temple Hornaday 1895

The position taken by our government in securing for an American author the benefit of the sale of his works at home, while practically estopping him from obtaining any advantage from their sales abroad, is somewhat analogous to its treatment of American ship-owners, who are allowed to pick up all the freights that offer inland and along the coast, but are forbidden to earn a single penny on the high seas.

International Copyright Considered in some of its Relations to Ethics and Political Economy George Haven Putnam 1887

You have already paid a dozen times more than the life of that d---- d sneak was worth; and more than that -- the longer you keep on paying you are helping to give color to their claim and estopping your own defense.

Colonel Starbottle's Client Bret Harte 1869

The practice of taking British seamen out of American merchant ships at the commencement of this century is cited as estopping Great Britain from any right to object.

The Civil War in America. 1861