MAINSPRING

mainspring

(noun) the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism

Source: WordNet® 3.1

Etymology

Noun

mainspring (plural mainsprings)

The principal spring of a clockwork mechanism, which drives it by uncoiling.

(figuratively) The most important reason for something (Cf. spring "origin of something" (literary) (often in the plural) the springs of her ambition).

Source: Wiktionary

Main"spring`, n.

Definition: The principal or most important spring in a piece of mechanism, especially the moving spring of a watch or clock or the spring in a gunlock which impels the hammer. Hence: The chief or most powerful motive; the efficient cause of action.

Source: Webster’s Unabridged Dictionary 1913 Edition

Do you know this game?

Wordscapes is a popular word game consistently in the top charts of both Google Play Store and Apple App Store. The Android version has more than 10 million installs. This guide will help you get more coins in less than two minutes of playing the game. Continue reading Wordscapes: Get More Coins