stick–to–it·ive·ness 
/stɪkˈtu:wətɪvnəs/ noun
/stɪkˈtu:wətɪvnəs/ noun [noncount] US, informal : the quality that allows someone to continue trying to do something even though it is difficult or unpleasant
▪ I admire her stick-to-itiveness. [=perseverance, tenacity]
▪ I admire her stick-to-itiveness. [=perseverance, tenacity]
