Meaning of “struggle” - Learner’s Dictionary

struggle

noun [ C ] us uk /ˈstrʌɡl/
I can lose weight but it's a real uphill struggle.He eventually won the struggle for supremacy.It's a poignant story about a poor family's struggle to survive.They're involved in a protracted struggle to save the building.This term has been a long, hard struggle.
TRY

B2 a situation in which you try very hard to do something difficult:

It was a real struggle to stay awake during the film.
FIGHT

B2 a fight between people

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