noun which may take the genitive case particle 'no'
unused; not yet used
Describes something that has not been used, often in a brand-new or pristine state. Commonly used for items, tickets, or resources.
未使用の切手を集めています。
I collect unused stamps.
このカードは未使用です。
This card is unused.
Compound of 未 (mi, 'not yet') and 使用 (shiyō, 'use').