to persist in anything undertaken; maintain a purpose in spite of difficulty, obstacles, or discouragement; continue steadfastly.
2.
to persist in speech, interrogation, argument, etc.; insist.
verb (used with object)
3.
to bolster, sustain, or uphold: unflagging faith that had persevered him.
Origin: 1325–75;Middle Englishperseveren < Middle Frenchperseverer < Latinpersevērāre to persist, derivative of persevērus very strict. See per-, severe
mid-14c., from O.Fr. perseverer, from L. perseverare "continue steadfastly, persist," from persevereus "very strict, earnest," from per- "very" + severus "strict" (see severity).