Answer:
Inventory on the plural of nouns :
In Somali, there is not one, but four ways to form the plural of nouns :
By adding a vowel suffix to the end of the name, usually -o ; -yo ; -oyin or -yaal.
By reduplicating a monosyllabic noun.
By making a tonal change on the noun : prosodic plural.
By adding a complex suffix : irregular plural.
For a given noun, the mechanism used is always the same.
Another feature of Somali is that a number of nouns switch gender when they are plural.
Detailed review of different types of plurals :
Type 1 - Feminine/Masculine, with -o ending
Type 2 - Feminine/Masculine, with -oyin ending
Type 3 - Masculine/Feminine, with -o or -yo ending
Type 4 - Masculine/Feminine, with -yaal ending
Type 5 - Masculine/Masculine, with -o or -yo ending
Type 6 - Masculine/Masculine, with reduplication
Type 7 - Masculine/Feminine, with tonal change
Type 8 - Irregular plurals
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