The term that is not related to Hadith is "Makruh."
- Da'if refers to a weak Hadith, i.e., a narration that has some flaw in its chain of transmission or content.
- Hasan refers to a good Hadith, i.e., a narration that is reliable but not as strong as Sahih Hadith.
- Isnad refers to the chain of narrators in a Hadith, i.e., the series of people who transmitted the narration from the Prophet Muhammad (peace be upon him) to the compiler of the Hadith.
- Makruh refers to actions that are disliked or discouraged in Islam but not necessarily prohibited. It is not a term related to Hadith specifically.