persevere
v.v. to keep trying to do something even when it is difficult or you feel like giving up.
v. to continue to do something despite difficulty or opposition. Often used in the context of personal effort or professional challenges.
You must persevere if you want to finish the race.
The small startup had to persevere through several months of financial losses before finally securing a major investor.
Despite the initial setbacks and the skepticism of his peers, the researcher chose to persevere with his hypothesis, eventually proving its validity through rigorous experimentation.
From Middle English perseveren, from Old French perseverer, from Latin persevērāre (“to continue steadfastly, persist, persevere”), from perseverus (“very strict or earnest”), from per (“through, by the means of”) + severus (“strict, earnest”). Doublet of perseverate.