[noun] [C] - the most important reason for something; the thing that makes something else happenGreed was the mainspring of his success.
MAINSPRING
Meaning of MAINSPRING in English
Cambridge English vocab. Кембриджский английский словарь. 2012
[noun] [C] - the most important reason for something; the thing that makes something else happenGreed was the mainspring of his success.
Cambridge English vocab. Кембриджский английский словарь. 2012