The grammar pattern A/V + 지 않는 한 translates to "unless" in English and is used to specify a condition that negates the main clause.
This structure is particularly useful when specifying conditions that must be met for something else to happen or to not happen.
Note that the condition comes before the main statement, connected with 한 to form the 'unless' construction.
Understanding how to use 지 않는 한 can help you express conditions in a straightforward manner, adding complexity and nuance to your sentences.