「原動力」

(pos:名詞)
<explanation>
yue:推動某樣嘢一直前進嘅原因（量詞：股）
eng:motivation
<eg>
yue:雖然份工好辛苦，但我兩個仔就係令我堅持落去嘅原動力。 (seoi1 jin4 fan6 gung1 hou2 san1 fu2, daan6 ngo5 loeng5 go3 zai2 zau6 hai6 ling6 ngo5 gin1 ci4 lok6 heoi3 ge3 jyun4 dung6 lik6.)
eng:Although my work is tough, my sons are the motivation that keeps me going.