Classes 5 and 6

Because this is a foundational concept, let's look at the big picture of how Classes 5 and 6 work.

1. The Singular (Class 5)
Surprisingly, the vast majority of Class 5 nouns have no prefix at all. Words like tunda (fruit) or gari (car) just use their base form. This class absorbs many borrowed words (like duka, soko, or jibu), which helps explain why so many words here don't look like traditional Bantu words. The traditional ji- prefix is actually quite rare, appearing mostly on very short monosyllabic stems like jiwe (stone) or jicho (eye), as well as a few others like jina (name), and as j- on vowel-initial stems like jambo (matter).

2. The Plural (Class 6)
To make these words plural, you add the prefix ma- to the beginning. So, tunda becomes matunda (fruits), and gari becomes magari (cars). For words that have the ji- or j- prefix, this prefix usually drops or merges when ma- is added (for example, jiwe becomes mawe, jicho becomes macho, and jambo becomes mambo). A great example of vowel contraction is the highly common noun jino (tooth), which becomes meno (teeth) with the irregular stem alternation jino/meno; learn the pair rather than deriving it by simply adding ma- to the full singular. A few words retain it as an exception, such as jina becoming majina.

3. Liquids, Abstract, and Collective Nouns
Class 6 is also the permanent home for mass nouns and liquids like maji (water) and mafuta (oil), as well as abstract and collective nouns like maisha (life), mazingira (environment), and mazungumzo (conversation). In their ordinary mass or collective use these words take Class 6 agreement. Some related singular or count senses exist, so learn the actual lexical meaning rather than assuming that ma- can never have a count counterpart.

4. Plurals for Class 11
Class 6 is not just for Class 5 plurals and liquids; it also serves as the plural form for many Class 11 (U-class) nouns. For example, ugonjwa (disease) becomes magonjwa (diseases).

5. Sentence Agreement
Noun classes are agreement groups, not grammatical gender. When you use a Class 5/6 noun, the words describing it must match. For verbs and pronouns, Class 5 nouns trigger li- or l- prefixes, while Class 6 nouns trigger ya- or y- prefixes. However, adjectives follow their own pattern, usually taking no prefix in the singular, but adding ji- for monosyllabic stems (like jipya). For vowel-initial adjective stems, they take j- in the singular (like jeusi). In the plural, they take ma-, but note the vowel contraction rule: ma- + e or i becomes me- (so ma-eusi becomes meusi). You can learn the specific rules for this in Class 5 and 6 Subject Agreement and JI-MA Adjective Agreement. Note: Any noun in this class that refers to a human or animal (like fundi/mechanic or bata/duck) will trigger Class 1/2 agreement instead.

6. Augmentatives (Making Things Big)
Class 5/6 is also used to make things larger. For example, moving mtu (person) into this class creates jitu (giant), which becomes majitu in the plural. You can learn more about this in Augmentatives in Class 5.

Note: Because most Class 5 nouns lack a prefix, beginners often confuse them with Classes 9 and 10. You can tell them apart because Class 5 nouns take a ma- plural, while Class 9 nouns do not change their form in the plural.

Possession and a Useful Contrast:
Tunda langu is “my fruit,” and matunda yangu is “my fruits.” The same contrast gives lako/yako (your) and lake/yake (his/her). Wingu (cloud) belongs to Class 5, with Class 6 plural mawingu; it is not a Class 11 example simply because it begins with w.