determination
dɪˌtəːmɪˈneɪʃ(ə)n/Submit

noun

the quality of being determined; firmness of purpose.

“those who succeed because of sheer grit and determination”

synonyms: resolution, resolve, resoluteness; will power, strength of will, strength of character, single-mindedness, sense of purpose, firmness of purpose, fixity of purpose, purposefulness; intentness, decision, decidedness; steadfastness, staunchness, perseverance, persistence, indefatigability, tenacity, tenaciousness, staying power, strong-mindedness, backbone, the bulldog spirit, pertinacity, pertinaciousness; stubbornness, doggedness, obstinacy, obdurateness, obduracy, inflexibility; spiritedness, braveness, bravery, boldness, courage, courageousness, pluck, pluckiness, stout-heartedness; Dunkirk spirit; sitzfleisch;

informal: guts, spunk, grit, stickability; stick-to-it-iveness;

archaic: intension

rare: perseveration
“it took all her determination to stand her ground”