Increasing or increased in quality, degree, or force by successive additions.
Yes, because the Montague-Capulet feud had most likely been going on for several generations, as Shakespeare alludes to by not telling us what the feud was over. If the reader is right to assume this, then even Romeo and Juliet's parents may not know what the feud was over and could have been blindly following their parents. This, by definitions is ignorance-" lack of knowledge, learning, information." If this is so, the entire feud would be pointless, because the Montagues and Capulets would have nothing to be feuding about.
Muir uses diction that produces a mood of dread and direness. The words in bold, difficult, difficult, crooked, force, struggling, fallen, tangled, fear, hungry and faint, all meet up to influence you into thinking that the author is at peril. The images are clear-cut so then you are able to make perceivable images of the story in your head. Diction can help make a mood which can help unite everything else.