A mursal narration is one with a drop at the end of the sanad, after the tābiʿī.
A muʿallaq narration is one with a drop at the beginning of the sanad, regardless of how many narrators are missing.
A ḥadīth is mardūd (rejected) when there is a break in the isnād or a criticism levelled at one or more of its narrators.
ʿAzīz is a ḥadīth narrated by at least two narrators at every level of the sanad.
