What is a basic power of every government that allows it to interpret laws?

Answer: "Judicial Power" is a basic power of every government that allows it to interpret laws.

Explanation:

The "judicial powers" are understood as the power of the U. S. government's judicial branch to listen cases and interpret, nullify laws, enforce and statutes with a view to provide judgement.

The Judicial Powers are categorized in different ways some examples are like Appellate Jurisdiction performed when appealing of case take place and heared by another court, Diversity Jurisdiction involve different states cases which are heared by federal court, Original Jurisdiction given by the court which very first hear a case etc.