The troll was not happy. He had been trying to build a fence around his home for days, but it kept falling over. You see, the troll didn’t like anyone. He wanted to build a fence so that his neighbors couldn’t visit him. He cut down many trees and then cut them into posts for his fence. He dug holes in the ground and put the posts in them. Then he laid long logs on top of the posts, but the logs kept falling down.

As the troll was sitting on a log, feeling ____________ about the unfinished fence, one of his neighbors walked by.

Which word best fills in the blank by clearly showing the writer's meaning?