willpower
nounUK /ˈwɪlˌpaʊə/
US /ˈwɪlˌpaʊər/
The strong feeling inside you that helps you keep trying even when something is hard.
She used her willpower to finish all her homework before playing.
OTHER MEANINGS
2. The mental energy a person uses to make themselves do something difficult.
It took a lot of willpower to get out of bed on that cold morning.
3. The ability to stop yourself from doing something you want to do but shouldn't.
He needed willpower to say no to the second piece of cake.
4. A firm decision to keep going toward a goal no matter what.
Her willpower helped her practice the piano every single day.