When one thing rubs and grates against another, it causes friction. That can include two clashing personalities or simply a match striking the matchbox and causing a spark.

A form of resistance, friction is caused by a chafing movement between two or more objects. In the 18th century, friction meant specifically a “resistance to motion,” but a few decades later grew to also describe disagreement or conflict. The friction between the brakes and your tires helps stop your car when you're going too fast. Not speeding in the first place can help avoid friction between you and the traffic police.

Definitions of friction
  1. noun
    the resistance encountered when one body is moved in contact with another
    synonyms: rubbing
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    abrasion, attrition, detrition, grinding
    the wearing down of rock particles by friction due to water or wind or ice
    adhesive friction, grip, traction
    the friction between a body and the surface on which it moves (as between an automobile tire and the road)
    type of:
    any mechanical force that tends to retard or oppose motion
  2. noun
    effort expended in moving one object over another with pressure
    synonyms: detrition, rubbing
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    the act of rubbing together; wearing something down by friction
    type of:
    effort, elbow grease, exertion, sweat, travail
    use of physical or mental energy; hard work
  3. noun
    a state of conflict between persons
    synonyms: clash
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    type of:
    a state of opposition between persons or ideas or interests
Word Family

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