The word “sushi” comes from an archaic Japanese term meaning what taste?

The word “sushi” comes from an archaic Japanese term meaning “sour-tasting.”

The meaning reflects sushi’s early relationship with fermentation. The oldest forms preserved fish through lactic fermentation involving rice, salt, and time. That process produced the sharp acidity associated with the dish’s name, even though early preserved-fish sushi was quite different from today’s nigiri and rolls.

The term is linked to an old terminal-form conjugation of an adjective meaning sour or sour-tasting. The grammatical form is archaic and is no longer used in ordinary modern Japanese in the same way, but it survives in the familiar food name.

Modern sushi usually gets its acidity from vinegar-seasoned rice rather than prolonged fermentation. Its flavor is not only sour: salt, sweetness, umami, and the taste of its toppings also matter. “Sushi” therefore describes the vinegared rice tradition, not simply raw fish; cooked seafood, vegetables, and other ingredients can all be used.