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to scratch the surface
01
to fail to deal with all aspects of a problem, topic, etc.
What is the origin of the idiom "scratch the surface" and when to use it?
The idiom "scratch the surface" originates from the concept of shallowly or lightly removing a thin layer from the surface of an object. Metaphorically, it implies a limited or superficial understanding or exploration of a subject or topic, without delving deeper into its complexities or underlying details. In other words, the phrase is used to emphasize the need for further investigation or analysis to gain a more comprehensive understanding or uncover hidden aspects.
Example
The documentary touched on the historical events, but it failed to scrape the surface of the cultural implications and long-term consequences.
The report provides a brief overview, but it merely scratches the surface of the issue without addressing its underlying causes.
The initial investigation only scratched the surface, dealing with the issue superficially.
The training session provided basic knowledge, but it only scratched the surface of the complex software's capabilities and features.
The abrasive rock formations scratched the surface of the hiking boots.
