Rashi on Exodus 32:3/רש"י על שמות ל״ב:ג׳

1ויתפרקו AND [ALL THE PEOPLE] BRAKE OFF — פרק is a term denoting “unloading a burden”. Being a transitive verb one would expect ויפרקו instead of the reflexive form ויפרקו but when they took them (the pendants) off their ears they themselves became unloaded from their pendants and therefore ויתפרקו “they unloaded themselves”, is the appropriate word to use; décharger in old French, English discharge.

2את נזמי is the same as מנזמי, (they unloaded themselves from their pendants), (את having the same meaning as מן), similar to (Exodus 9:29) “As soon as I am gone out את העיר”, which means מן העיר, from the city.