Some basic Hausa nouns have a plural formed primarily by replacing the singular’s final vowel rather than adding a visibly longer ending. Thus mashi → masu “spear(s)” and kwaɗo → kwaɗi “frog(s).” The shorter pair rami → ramu “hole(s)” is also established, alongside the common alternative plurals ramuna and ramuka. A nearby consonant can differ in the plural as well, making the result look less transparent: kaza → kaji “hen(s).”
This is a small, restricted class, not a productive procedure for pluralizing any new word. The page title internal vowel change is a convenient broad label; in the core examples here, the operation is specifically final-vowel replacement within the noun’s lexical stem. All ordinary examples are neutral Nigerian Standard Hausa, and pronunciation notation is explicitly labeled (academic).
The core flip in vowel quality
In one central subgroup, a singular ending in front ii has plural uu, while a singular ending in back oo has plural ii. The plural vowel is long and high-toned. The stem itself supplies the rest of the word.
| Ordinary singular | Gender | Ordinary plural | Fully marked pronunciation (academic) | Meaning |
|---|---|---|---|---|
| rami | masculine | ramu | ráamìi → ráamúu | hole(s), pit(s) |
| mashi | masculine | masu | máashìi → máasúu | spear(s) |
| kwaɗo | masculine | kwaɗi | kwàaɗóo → kwàaɗíi | frog(s) |
| baƙo | masculine | baƙi | bàaƙóo → bàaƙíi | guest(s), stranger(s) |
Rami ɗaya ya buɗe a hanya bayan ruwan sama, amma ma’aikata sun rufe sauran ramu.
One hole opened in the road after the rain, but the workers filled the other holes.
A gidan tarihi akwai mashi ɗaya a wannan akwatin da masu uku a wancan.
In the museum there is one spear in this case and three spears in that one.
Kwaɗo ya yi tsalle cikin ruwa, sai sauran kwaɗi suka biyo shi.
A frog jumped into the water, and then the other frogs followed it.
Baƙo ɗaya ya iso da safe, amma muna jiran ƙarin baƙi da yamma.
One guest arrived in the morning, but we are expecting more guests in the evening.
English gives no close parallel. Its vowel-changing plurals such as “foot/feet” are isolated historical leftovers, while its regular plural is -s. Hausa has many lexical plural classes, and this restricted replacement class is one of them. Its existence does not make vowel change the general Hausa strategy.
Why some consonants also look different
The consonant beside the replacement vowel can also alternate in particular lexical pairs. Kaza → kaji reflects the Hausa z ~ j relationship found in front-vowel formations, while mashi → masu shows sh ~ s in this plural pair. These are not exceptionless rules that change every z before i or every sh before u, and the consonants are not extra plural suffixes.
Two additional common replacements belong with this restricted family:
| Ordinary singular | Gender | Ordinary plural | Fully marked pronunciation (academic) | What changes |
|---|---|---|---|---|
| kaza | feminine | kaji | kàazáa → kàajíi | final aa → ii; z appears as j |
| yatsa | feminine in the reference standard; variation occurs | yatsu | yáatsàa → yáatsúu | final aa → uu |
Kazar ta shiga ɗaki, amma kajin sun tsaya a tsakar gida.
The hen went into the room, but the chickens stayed in the courtyard.
Na ji ciwo a yatsa ɗaya, amma sauran yatsu suna motsi lafiya.
I felt pain in one finger, but the other fingers move normally.
The class is not a single blind substitution rule. Kaza selects kaji, but another feminine noun in -a, such as riga, selects riguna. Yatsa selects yatsu, but ƙafa selects ƙafafu, with the discontinuous pattern described on the plural in -uu and -aau page. Some basic nouns also have established alternative plurals; those alternatives must be learned as separate lexical facts.
Gender belongs to the singular entry
Most examples above are masculine in the singular, but kaza is feminine. That contrast appears in singular agreement: wannan rami ne “this is a hole,” but wannan kaza ce “this is a hen.” It disappears in the plural, where both nouns use the common plural series.
Wannan rami ne, amma waɗannan ramu ne.
This is a hole, but these are holes.
Wannan kaza ce, amma waɗancan kaji ne.
This is a hen, but those are chickens.
The final -i of kaji does not signal masculine gender, and the final -u of ramu does not carry the singular’s gender. English speakers must therefore avoid assigning Hausa gender from the English referent or from the plural’s last vowel. A useful entry records kaza (f.), kazar, kaji, kajin and rami (m.), ramin, ramu, ramun.
Definite and genitive-linked plurals
As elsewhere in the plural system, these nouns take the plural -n series. The final long vowel shortens before the consonant in pronunciation, and ordinary boko writes the form joined.
| Bare plural | Definite/linked form | Linked phrase |
|---|---|---|
| ramu | ramun | ramun hanya “the road’s holes” |
| masu | masun | masun gidan tarihi “the museum’s spears” |
| kwaɗi | kwaɗin | kwaɗin tafkin “the pond’s frogs” |
| baƙi | baƙin | baƙin otel “the hotel guests” |
| kaji | kajin | kajin gona “the farm chickens” |
| yatsu | yatsun | yatsun hannu “the fingers” |
An gyara ramun hanyar kafin damina.
The holes in the road were repaired before the rainy season.
Kajin gona sun koma cikin keji da yamma.
The farm chickens returned to the coop in the evening.
Possessive pronouns use the same linker series: yatsuna “my fingers,” baƙinsa “his guests,” kajinta “her chickens.” In the reference-standard feminine paradigm, compare singular yatsata “my finger” and kazarta “her hen.” Masculine-linked yatsana is also attested in contemporary usage, reflecting lexical gender variation in yatsa; it is not a different plural pattern. The head noun’s number and lexical gender choose the form; the possessor’s gender does not choose the linker.
Na ƙone yatsata ɗaya, amma sauran yatsuna ba su ji ciwo ba.
I burned one finger, but my other fingers were not hurt.
Wasu kaji sun shiga lambu. Kajin sun cinye ganyen latas kafin a kore su.
Some chickens entered the garden. The chickens ate the lettuce leaves before they were chased away.
The bare phrase wasu kaji introduces a new set; kajin then retrieves that discourse-given set. Bare nouns can also receive definite readings from context, so this is not a command to translate every English “the” with -n. It is a contrast between an overtly introduced indefinite and an overtly identifiable return.
Common Mistakes
1. Treating vowel replacement as a general rule.
❌ riga ɗaya, rugu biyu
Incorrect — riga does not belong to this restricted class.
✅ Riga ɗaya, riguna biyu.
One gown, two gowns.
2. Preserving sh before the new back vowel.
❌ Mashu suna cikin akwatin.
Incorrect — the established plural of mashi is masu.
✅ Masu suna cikin akwatin.
The spears are in the case.
3. Missing the consonant alternation in kaza → kaji.
❌ Kazai sun shiga gona.
Incorrect — the lexical plural is kaji, with j.
✅ Kaji sun shiga gona.
Chickens entered the farm.
4. Carrying feminine singular agreement into the plural.
❌ Waɗannan kaji ce.
Incorrect — plural kaji takes the common plural copula ne.
✅ Waɗannan kaji ne.
These are chickens.
5. Attaching the singular linker or writing a boundary in ordinary text.
❌ kazar-n gona sun fita
Incorrect — kazar is singular, and ordinary spelling does not use a hyphen before the plural linker.
✅ Kajin gona sun fita.
The farm chickens went out.
Key Takeaways
- This restricted class replaces a final vowel: rami → ramu (alongside ramuna/ramuka), kwaɗo → kwaɗi, kaza → kaji, yatsa → yatsu.
- The new vowel can trigger regular consonant alternations, as in sh → s and z → j.
- Do not extend the pattern beyond attested lexical pairs; similar-looking nouns may select completely different plural classes.
- Singular gender, plural agreement, and the definite/linker form are separate parts of the mini-paradigm: kaza—kazar—kaji—kajin.
Related Topics
- Why Hausa Plurals Must Be Learned LexicallyA2 — Understand why Hausa plural patterns offer useful clues but cannot replace learning each noun's attested singular–plural pairing.
- Plural in -e and -ayeA2 — Learn the related Hausa -aaCee and -aayee plural shapes, their lexical limits, and their definite, linked, and agreement forms.
- Plural in -uu and -aauA2 — Distinguish Hausa suffixal -uu plurals from the internal -aa…uu pattern and use both with correct agreement, definiteness, and linking.
- Reduplicated Plural PatternsA2 — Recognize Hausa plurals that repeat consonants or larger pieces of the noun while keeping each singular–plural pair lexical.
- Tone and Vowel Length in Plural FormationA2 — Understand how Hausa plural patterns can replace a noun’s tone melody and alter vowel length even though ordinary boko spelling hides both.
- Plural Definite FormsA2 — How every Hausa plural uses the common -n definite/linking series while retaining its own lexical plural shape and boundary adjustments.