means A Japanese dish of vinegared rice paired with raw fish, seafood, vegetables, or egg, served in small artful pieces.

from From Japanese sushi, where the word actually points to the rice, not the fish. It traces back to a sour, fermented form — su meaning 'vinegar' or 'sour,' tied to an old verb sense of something acidic — because the earliest sushi (narezushi) was fish preserved by packing it in fermenting rice, the rice then discarded. Over centuries the rice stopped being trash and became the point, until Edo-era cooks sped the whole thing up with vinegared rice and fresh fish — the ancestor of the bite-sized sushi we know.