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“In clover” means living in comfort or prosperity. The phrase comes from the image of animals feeding on rich, abundant clover.

Efficacy is about whether something works. Efficiency is about how smoothly it works, with minimal wasted time, effort, or cost.

Medal is a prize or honor. Meddle means interfere in something that is not your concern. Learn the difference with clear examples.

The word sideburns began as burnsides, named after General Ambrose Burnside. Later, speakers flipped the order and the modern form stuck.