What is the correct interpretation of the hadith "Allah has cursed the woman who plucks eyebrows (An-Namisah) and the woman who has her eyebrows plucked (Al-Mutanammisah)," taking into consideration the linguistic meaning of "An-Nams," what falls within the boundaries of permissible adornment, and what is the ruling on completely plucking the eyebrow or leaving it as a thin line?

Plucking of eyebrows (al-Nams) is absolutely forbidden. This is the preponderant view, as it is the most supported by evidence and closest to the revelation. Imam Abu Dawud clarified that al-Nams is plucking the eyebrows until they become thin. The majority of jurists also consider plucking excess facial hair beyond the eyebrows to fall under al-Nams.

Al-Nams is the plucking of hair from the face, as explicitly stated by Hadith commentators and linguistic authorities.

Ibn al-Jawzi's preference that al-Nams is a distinguishing mark of immoral women contradicts the apparent meaning of the Hadith, which explicitly states the reason for prohibition: changing Allah's creation in pursuit of beauty. The context of Ibn Mas'ud's Hadith with Umm Ya'qub confirms this; if al-Nams were a distinguishing mark of immoral women, Umm Ya'qub would not have been surprised by the act.

Further confirming the absolute prohibition of al-Nams is the consensus of jurists on the absolute prohibition of teeth-gapping (taflij) for beauty, which is its counterpart in the Hadith, without any restriction that it be a distinguishing mark of immoral women.

As for the foundational principle, none of the early or contemporary scholars established a clear definition for major sins as Sheikh Al-Tantawi (may Allah have mercy on him) did, stating that it is anything that squanders one of the five essential interests or compromises internal and external security. This definition itself requires a definition, and not all prohibitions can be reduced to it. The cursing mentioned in the noble Hadiths cannot be confined to what Sheikh Al-Tantawi mentioned. Major sins are not all of the same degree; some are graver and greater than others.