Meaning of “guts” - Learner’s Dictionary

guts

noun [ plural ] uk us /ɡʌts/ informal
BRAVERY

B2 the bravery and determination that is needed to do something difficult or unpleasant:

It took guts to stand up and tell the boss how she felt.
ORGANS

the organs inside a person's or animal's body

(Definition of “guts” from the Cambridge Learner’s Dictionary © Cambridge University Press)