Easy as in cause The primary source of power, often located at the bottom, that drives a mechanism or device. Clear All
3 Example Sentences Showcasing the Meaning of 'Mainspring'
The engineer carefully wound the mainspring of the old-fashioned music box before it played a sweet melody.
Friendship forms the mainspring of emotional support and well-being in one's life.
The mainspring behind a healthy lifestyle is a balanced diet and regular exercise.
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