Elementary Arabic Morphology 1
Indeclinable Nouns
What is understood from an indeclinable noun?
What nouns are indeclinable?
How many forms of indeclinable nouns are there?
An indeclinable noun is a noun whose last syllable does not change when placed into different parts of a sentence.
There are so few indeclinable nouns compared to declinable ones. The popular indeclinable nouns are: personal pronouns, conjunctions, demonstrative pronouns, conditional nouns and interrogative pronouns.
There are four forms of indeclinable nouns: al-dumm, al-fath, al-kasr and al-sukūn:
حَیثُ کَیفَ ﺃمسِ مَن
(who, yesterday, how, where)