noun which may take the genitive case particle 'no', noun
salt-free; unsalted; no salt added
Used especially on food labels and in dietary contexts to indicate that no salt was used in preparation.
This bread is salt-free.
I'm looking for salt-free seasonings.
Compound of 食塩 (table salt) + 不 (not) + 使用 (use), literally 'no salt used'.