In Arabic, do you say مبنيّ or مبنيّة for "indeclinable"? Well, you can use both: masculine or feminine. Here is why.
Sibawayhi's book al-Kitab was the first formal and analytical Arabic grammar. It is a groundbreaking work. Some background
The Arabic expression فأسقيناكموه means "and we gave it to you to drink". This intriguing phrase is from the Quran. Let's analyze it.
Reading grammar books in Arabic can be challenging if you cannot decode the language of the grammarians (i'rab إعراب). But there is a formula.