student asking question

Can I say "filthy" instead of "dirty" here? What's the difference between "dirty" and "filthy"?

teacher

Native speaker’s answer

Rebecca

Yes, you can say "filthy" here except there is a slight difference between "dirty" and "filthy". "Dirty little liar" is also a fairly common expression and "filthy little liar" is not a common expression. The word "filthy" is also a little stronger than "dirty". Something that is "filthy" refers to something that is extremely dirty and disgusting. Ex: The public restroom is filthy. Ex: The car is dirty.

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