Sentence:  Robert Hovell, Licence to Hunt Foxes, &c. 1231 [...] The King has granted to Robert Hovel that he and his heirs may have freely and without <WSD>impeachment</WSD> of the King's foresters and their ministers, through the whole forest bailywick of Essex, their dogs running for fox or hare and to chase and take the same, as is more fully contained in the King's charter to him thereupon made. And it is commanded Richerd de Munfichet that he permit the said Robert and his heirs to have without <WSD>impeachment</WSD> their dogs running though all the aforesaid forest for hare and fox and to chase and take the same as is aforesaid. 
Meaning of the word marked with <WSD> tags:  Hindrance; impediment; obstruction.