Heathcliff took the handsomest, but it soon fell lame, and when he discovered it, he said to Hindley, "You must exchange horses
with me: I don’t like mine." What does lame mean in this sentence from the passage?
A) changed in color or hue
B) reclined, in order to rest
C) emboldened, confident, brash
D) weak, ineffective or disabled
Lame is the one who has trouble walking because of a physical defect or because he is weak, ineffective or incapacitated.
Heathcliff took the most handsome horse, but he soon had trouble walking because he was weak, or with some physical defect that made it difficult to get around.