sui generis
adjective/ˌsuːi ˈdʒenərɪs/, /ˌsuːaɪ ˈdʒenərɪs/
/ˌsuːi ˈdʒenərɪs/, /ˌsuːaɪ ˈdʒenərɪs/
(from Latin, formal)- different from all other people or things synonym uniqueWord OriginLatin, literally ‘of its own kind’.
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sui generis