unique: [17] Unique comes via French unique from Latin ūnicus ‘only, sole’. This was derived from ūnus ‘one’, a distant relative of English one. It originally meant simply ‘single, sole’ in English, and the extended sense ‘unequalled, unparalleled’, which has often drawn the hostile criticism of purists (particularly when accompanied by qualifiers such as very or completely), did not emerge until the late 18th century, under French influence. => one, union