How to pronounce prove

transitive verb. 1a : to establish the existence, truth, or validity of (as by evidence or logic) prove a theorem the charges were never proved in court.

The answer is the year 1066 and 2000 years of invasions, occupations, and political complexities that go far beyond “correctness.” “Calm” does, in fact, have a silent L because of 1066; however, in some regions it has a lightly pronounced L. Why? Because that’s how language works naturally over time.