Al-mawqūf (literally, halted) consists of the sayings and actions of the Companions (raḍ. ʿanhum).
Al-maqṭūʿ (literally, severed) consists of the sayings and actions of the tābiʿūn and those after them.
The definition of al-marfūʿ in al-Mulakhkhaṣ: al-marfūʿ (literally, that which is raised) is what is attributed to the Messenger of Allāh ﷺ.
If the narrators of a ḥadīth agree in their wording of transmission, in any verbal feature, in an action or in some shared quality, this is al-musalsal (a chained or serial ḥadīth).
If any one of the attributes of the ṣaḥīḥ or the ḥasan is missing, the ḥadīth is ḍaʿīf (literally, weak).
