willpower

n.

意志力；毅力；

1. He hasn't the willpower to stop eating so much.
   他缺乏意志力，克制不住自己的贪吃。
2. But the bigger issue is imagination and willpower.
   但更重要的是想象力和意志力。

Willpower :
WILL POWER
Will Power
From good intentions to willpower.
The physiology of willpower: linking blood glucose to self-control
Willpower in a cognitive-affective processing system: The dynamics of delay of gratification.
Principles of self-regulation: The nature of willpower and self-control
A hot/cool-system analysis of delay of gratification: dynamics of willpower.
Decision making, impulse control and loss of willpower to resist drugs: a neurocognitive perspective.
Self-control relies on glucose as a limited energy source: Willpower is more than a metaphor.
Ego Depletion—Is It All in Your Head? Implicit Theories About Willpower Affect Self-Regulation
From Firm Muscles to Firm Willpower: Understanding the Role of Embodied Cognition in Self-Regulation | Journal of Consumer Research ...
The Neurocognitive Mechanisms of Decision-making, Impulse Control, and Loss of Willpower to Resist Drugs