Borrowed from French unique.

• IPA: /juːˈniːk/, /jəˈniːk/

unique (comparative uniquer, superlative uniquest)

1. (uncomparable) Being the only one of its kind; unequaled, unparalleled or unmatched.

   Synonyms: one of a kind, sui generis, singular

   Every person has a unique life, therefore every person has a unique journey.

   • 1963, Margery Allingham, chapter 3, in The China Governess: A Mystery, London: Chatto & Windus, →OCLC ↗:

     ‘ […]  There's every Staffordshire crime-piece ever made in this cabinet, and that's unique. The Van Hoyer Museum in New York hasn't that very rare second version of Maria Marten's Red Barn over there, nor the little Frederick George Manning—he was the criminal Dickens saw hanged on the roof of the gaol in Horsemonger Lane, by the way—’

2. Of a feature, such that only one holder has it.
3. Particular, characteristic.
4. (proscribed) Of a rare quality, unusual.

• unicity
• one-of-a-kind
• inimitable

• French: unique
• German: einzigartig, unikal, einzig
• Italian: unico, peculiare, speciale
• Portuguese: único
• Russian: уника́льный
• Spanish: único, señero

• Italian: singolare, speciale, originale

unique (plural uniques)

1. A thing without a like; something unequalled or unparallelled; one of a kind.
   • 2020, John Harris, Exploring Roguelike Games:

     […] uniques of the game, Sauron and Morgoth, are found on levels 99 and 100 of the dungeon respectively, […]