What does sui generis mean?
Sui generis
is a Latin phrase that means "of its (his, her, their) own kind; in a class by itself; unique
Sui generis (/ˌsuːiˈdʒɛnərɪs/;[1] Latin:[ˈsʊ.iː ˈɡɛnɛrɪs]) is a Latin phrase that means "of its (his, her, their) own kind; in a class by itself; unique."[2]