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main·spring
 mainspring
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- pronunciation:
- meIn
sprIng
- features:
- Word Combinations (noun)
| part of speech: |
noun |
| definition 1: |
the principal spring in a mechanism such as a timepiece, that provides motive force by uncoiling.
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| definition 2: |
the principal motive force behind something.
Unemployment was the mainspring of social unrest. |
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