/ ˌpɜːsɪˈvɪə(r); NAmE ˌpɜːrsəˈvɪr/ verb
[ v ] persevere (in sth / in doing sth) | persevere (with sth/sb) ( approving ) to continue trying to do or achieve sth despite difficulties :
Despite a number of setbacks, they persevered in their attempts to fly around the world in a balloon.
She persevered with her violin lessons.
You have to persevere with difficult students.
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WORD ORIGIN
late Middle English : from Old French perseverer , from Latin perseverare abide by strictly, from perseverus very strict, from per- thoroughly + severus severe.