There's a strange look of feverish excitement in his bloodshot eyes, making them a sharper and brighter blue.
The Boy Who Dared
Originally feverish meant causing a high temperature or having a high temperature. By the 17th century, it gained another meaning to convey a sense of intense emotion or agitation as if affected by a high fever.
He remained that way, breathing hard with peevish anger.
Grendel
If you know that having a pet peeve means there's a particular thing that annoys you a lot, then you can see how being peevish would mean that you're easily annoyed in general.
easily disturbed or disgusted by unpleasant things
Mama had always been squeamish about lizards and snakes and bugs and things, and you could tell that it just made her flesh crawl to have to touch this one.
Old Yeller
If you're squeamish, you should probably avoid watching horror movies. The word comes from Anglo-Norman, but its origins are unclear.
tending to associate only with people of a similar background
Elderly Mr. and Mrs. Riddle had been rich, snobbish, and rude, and their grown-up son, Tom, had been, if anything, worse.
Harry Potter And The Goblet Of Fire
A snob was originally a working-class person, but over time its meaning evolved, first referring to a lower-class person who imitated someone wealthier and more cultured, and eventually becoming someone who dislikes people or culture they think is beneath them.