Chapter 3 - The Nouns of Somali

• Nouns (or "substantives") are divided into two genders : masculine and feminine.
• Nouns indicate number : singular and plural. There are several plural formatives.
• Nouns distinguish grammatical cases : absolutive, nominative, genitive and vocative.
• Nouns also have a feature known as "gender polarity", in which some nouns have one grammatical gender in the singular and another gender in the plural. It has nothing to do with sex !

 Gender 

Gender is not marked in nouns without the definite article. The gender of nouns does not follow any particular rule and is not always obvious, although it can often be guessed at phonetically.



 Number 

Nouns form their plural in several ways, including reduplication. Many nouns exhibit gender polarity, whereby they change gender in the plural form, e.g. buug-ga (= the book) is masculine in the singular, but buugag-ta (= the books) is feminine in the plural.


 Case 

Absolutive case
The basic form of a Somali noun is in absolutive case. In this case, the article maintains the vowel -a.

Somali	English
buug	(a) book
buug-ga	the book
gacan	(a) hand
gacanta	the hand

Nominative case
The subject of a sentence takes nominative case. In this case, the article takes the ending -u. If the subject of the sentence includes multiple nouns, only the last takes the nominative ending for the article.
If there is no article, a tonal change signifies nominative case, although this is not represented in the orthography.
Feminine nouns which do not take modifiers and end in a consonant take the suffix -i in nominative case without an article.

Somali	English
nin	man
nin-ka	the man
nin-ku...	the man... (followed by a verb)
nin-ka iyo wiil-ku...	the man and the boy...
naag	woman
naagti	woman... (nominative non-modified form)
naagtu	the woman... (subject with modifier)

Genitive case
Genitive case is generally indicated through a tonal change.
Some feminine nouns take an ending, -eed, -aad or -od depending on the final consonant of the root word.

Somali	English
áf	(a) language
carab	Arab (people)
áf carabeed	Arabic language (i.e. language of the Arabs)

Vocative case
Vocative case is indicated either through a tonal change or with the suffixes -ow (m. sg.), -ohow (m. pl.), -eey/-aay/-ooy (f. sg.) or -yahay (f. pl.).

              Source: http://hooyo.web.free.fr