perseverance
Keeping on trying hard, even when it is difficult.
Perseverance means continuing to work toward a goal even when things get difficult, boring, or discouraging. It's what keeps you practicing piano scales when your fingers stumble, or working through a challenging math problem when the first three attempts don't work out.
Perseverance isn't the same as stubbornness. A stubborn person refuses to change their approach even when it's clearly not working. Someone with perseverance might try different methods, ask for help, or take breaks, but they don't give up on what matters to them. When Thomas Edison tested thousands of materials before finding the right filament for the light bulb, that was perseverance. When you spend weeks building a treehouse, fixing mistakes and solving problems as they arise, that's perseverance too.
You might hear someone say they persevered through a tough season, or that a scientist's perseverance led to an important discovery. Perseverance is what turns “I can't do this yet” into “I can do this.” It's the quality that helps people finish what they start, learn difficult skills, and accomplish things that once seemed impossible.