Sentence:  The horse neighs, but the ass <WSD>brays</WSD>: the last is performed by a very loud, long, disagreeable, discordant cry, consisting of discords alternately sharp and flat. He seldom <WSD>brays</WSD> but when pressed with hunger or love. [...] When gelded, the ass <WSD>brays</WSD> with a low voice; and, though he makes the same efforts and the same motions of the throat, yet the sound reaches to no great distance. 
Meaning of the word marked with <WSD> tags:  Of an animal (now chiefly of animals related to the ass or donkey, and the camel): to make its cry.