What does sushi mean? Raw fish? Rolled up? Delicious?
Sushi actually means vinegared rice. All sushi contains vinegared rice. This was news to me too. The origins of sushi exist in the practice of fermenting fish. The fish would be fermented by wrapping it in fermenting rice. Once the fish was done, the rice would be discarded. Later vinegar was added to the rice to improve the flavor and the rice began to be eaten with the fish.
Modern sushi is not fermented. This came to be for reasons of time and efficiency. Modern sushi is an early form of fast food, easy (enough) to prepare and easily held in the hand.
Modern sushi is not fermented, but all sushi contains vinegared rice.