yuán​dòng​lì

driving force

原动力 (原動力) yuán​dòng​lì
driving force noun
the fundamental cause, primary agent, or motivation behind a process or action
motive force noun
the physical power or energy that initiates and maintains motion in a mechanical system

Frequency

Movie subtitles
0.240 per million appears in 0% of films
Written text
1.27 per million

Sources

Definitions
CC-CEDICT