/ˈswaɪ dʒɛnərɪs/ – Phrase
Definition: Độc lập, không thuộc về bất kỳ loại nào khác.
A more thorough explanation: unique; in a class of its own
Example: “The crisis that began this time in March and lasted until now is sui generis. It was not like the crisis in 1992 or 1976 or 1973. ”