not that sortnot the samenot the typenulli secundusof a sortof another sortof sortsoffbeatotherother thanotherwiseout of the ordinaryout of this worldout-of-the-waypeculiarpeerlessrarerecherchesecond to none
It is easy to describe second-rate talents, because they fall into a class and enlist under a standard; but first-rate powers defy calculation or comparison, and can be defined only by themselves. They are sui generis, and make the class to which they belong.
Source: wiktionary
The transcendent case before us is absolutely sui generis.
Source: wiktionary
The eminent Italian geologist, Stoppani, goes further than I had ventured to do, and treats the action of man as a new physical element altogether sui generis.
Source: wiktionary
The system was neither free enterprise nor socialism; it was sui generis, one of the unique creations of the Middle Ages.