per·se·ver·ance 
/ˌpɚsəˈvirəns/ noun
/ˌpɚsəˈvirəns/ noun [noncount] : the quality that allows someone to continue trying to do something even though it is difficult
▪ His perseverance was rewarded: after many rejections, he finally found a job. ▪ Perseverance is required to perfect just about any skill.
▪ His perseverance was rewarded: after many rejections, he finally found a job. ▪ Perseverance is required to perfect just about any skill.
