Which term means 'to apply a substance for reducing friction'?

The term that means 'to apply a substance for reducing friction' is "lubricate." Lubrication involves the application of a substance, typically known as a lubricant, such as oil or grease, to surfaces in mutual contact to minimize friction and wear between moving parts. This is crucial in many mechanical systems, where excessive friction can lead to overheating, reduced efficiency, and potential damage to components.

In various industries, lubrication is a key maintenance practice to ensure the longevity and effective operation of machinery. By reducing the friction between surfaces, lubricants help improve performance, enhance energy efficiency, and maintain the integrity of equipment over time.