mainspring Meaning, definition in Cambridge English Dictionary
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Meaning of "mainspring" - English Dictionary

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mainspringnoun [C usually singular]

uk   us   /ˈmeɪn.sprɪŋ/ formal
the most important reason for something; the thing that makes something else happen: Work was the mainspring of his life.
Translations of “mainspring”
in Chinese (Traditional) 主要原因, 主要動力…
in Chinese (Simplified) 主要原因, 主要动力…
(Definition of mainspring from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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