Sui generis(adjective)
(Constituting a class of its own/unique)
Hindi meaning:अद्वितीय
Synonyms: Exclusive, Uncommon, Onliest, One and only, Unique
Antonyms: Common, Ordinary, Regular, Commonplace
Example: When Twitter launched, it was viewed as sui generis because of its unique style of communication.
Trick to remember: Ye bht generous hai isliye Sui generis hai 
