وَمِنْهَا: «مُذْ» وَ«مُنْذُ» بِمَعْنَى أَوَّلِ الْمُدَّةِ، إِنْ صَلَحَ جَوَابًا لِـ«مَتَى».
Translation: Mudh and mundhu refer to the start of a period when they can answer a “since when?” question.
Mudh and mundhu can refer to a starting point or the whole period. The book tests the difference using the questions “since when?” and “how long?”