https://chinese.stackexchange.com/a/38716 spurred this question. 黑鍋 - Wiktionary
How did "black wok" semantically shift to mean definition 2 above? In 2020, Chinese cooking require woks that are usually black, so I can't imagine how it appertains to 'blame for a crime'?
As a verb, 背 'carry on the back' or 'bear'. Source for picture below. 背黑鍋 - Wiktionary