(idiomatic) To barely begin; to see or do only a fraction of what is possible.
This course only scratches the surface of the subject.
Scratch-the-surface Sentence Examples
It is difficult to scratch the surface of laminate flooring, but over time, your German Shepherd running to meet you at the door may begin to wear down the melamine and eventually scratch up the pattern underneath.
As you study wine, you will discover that the four categories above only scratch the surface of wine knowledge.
Dust and other particles can scratch the surface of your disk, causing imperfections in copying and playback.
Summary I've barely begun to scratch the surface of Perl here.
Summary I 've barely begun to scratch the surface of Perl here.