Aunt Alexandra's traditional views and strict social expectations are at odds with Scout's free-spirited and independent nature, causing tension between them. Scout likely feels suffocated by Aunt Alexandra's attempts to impose her beliefs and conformist values on her, leading to their uneasy relationship.
Aunt Alexandra's pinprick of apprehension and subsequent shake-off help create suspense by hinting at an underlying tension or threat that has the potential to disrupt the calm facade of the situation. It establishes a sense of foreboding that something unsettling may be looming, keeping readers on edge as they anticipate what might unfold next.
be on edge (teeth), set on edge (teeth)
She calls them Aunt Casey and Uncle Toole.
the sharp is called the teeth and the cutting edge is the blade
incisal
The 'teeth' of a comb are the spikes that glide through your hair when you use it. These teeth are fixed into the back of the comb which is rigid and keeps the comb straight. The 'tooth edge' of the comb is therefore the edge of the comb where all the teeth are separate and rough when you feel it - opposite to the back of the comb which is smooth. If you run your thumb nail down the tooth edge of a come all the teeth will make a 'plinking' sound.
Teeth are the part of a body that is also the edge of a saw.
How the teeth are aligned in relation to the jaw is one cause of teeth being on edge. Another cause can be stress. Dental braces is one way to stop it. Another way would be to relax the jaw.
when a chunk of your tooth comes of and you have a rough edge.
Simple machines
The front teeth have a chisel-like shape, the rear ones have a flat top for grinding.
these are tools which have teeth in the edge were it's use for cutting