volition

n.

意志；意愿；决定；选择

1. She offered to help us of her own volition.
   她自愿提出要帮助我们。
2. She left entirely of her own volition.
   她完全是自愿离开的。
3. I didn't ask him to go;he went of his own volition.
   我没有要求他去，他是出于自愿的。
4. Such cloudy weather can wear people's volition.
   这种阴阴的天气最是消磨人的意志。
5. How can ability make his volition firmer?
   怎么样才能让自己的意志更坚强？

The problem of volition.
Volition and Conflict in Human Medial Frontal Cortex
Volition and personality: Action versus state orientation
The Role of Volition in Learning and Performance
Ego Depletion: A Resource Model of Volition, Self-Regulation, and Cont...
The Best-Laid Plans: Modern Conceptions of Volition and Educational Research
Deglutitive tongue force modulation by volition, volume, and viscosity in humans.
Ego depletion: A resource model of volition, self-regulation, and controlled processing.
How hallucinations may arise from brain mechanisms of learning, attention, and volition.
Internally generated preactivation of single neurons in human medial frontal cortex predicts volition