Meaning of “endeavour” - Learner’s Dictionary

endeavour

verb UK US endeavor us uk /ɪnˈdevər/
endeavour to do sth formal

to try very hard to do something:

I endeavoured to help her, but she wouldn't let me.
endeavour noun [ C, U ] UK US endeavor

human/artistic endeavour

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