gut

The alimentary canal, especially the intestine.

The abdomen of a person, especially one that is enlarged

“beer gut”

The intestines of an animal used to make strings of a tennis racket or violin, etc.

A person's emotional, visceral self.

“I have a funny feeling in my gut.”

A class that is not demanding or challenging.

“You should take Intro Astronomy: it's a gut.”

A narrow passage of water.

“the Gut of Canso”

The sac of silk taken from a silkworm when ready to spin its cocoon, for the purpose of drawing it out into a thread. When dry, it is exceedingly strong, and is used as the snood of a fishing line.

To eviscerate.

“The fisherman guts the fish before cooking them.”

To remove or destroy the most important parts of.

“Congress gutted the welfare bill.”

Made of gut.

“a violin with gut strings”

Instinctive.

“gut reaction”