Several common Hausa intransitives end in short -i or -u, including faɗi “fall,” wuni “spend the day,” mutu “die,” and haihu “give birth.” These belong to the peripheral Grade 3 subclass commonly called Grade 3b. Neighboring intransitives such as gaji “become tired” have similar endings but do not match Grade 3b’s formal specification and are best treated as irregular lexical verbs. In both sets, -i and -u are lexical: they are not tense endings and cannot be swapped to create object forms.
All unlabelled examples are (neutral Nigerian Standard Hausa). Ordinary boko omits tone and vowel length. In technical notation the core disyllabic members generally have a High–Low melody and a short final vowel; always verify an individual verb in a tone-marked dictionary rather than reading that melody from ordinary spelling.
A small basic class, not a productive suffix rule
The class is easiest to recognize as a list of established lexemes. The final vowel correlates neither with English meaning nor with TAM.
| Finite verb | Core meaning | Valency | Common verbal-noun behavior |
|---|---|---|---|
| faɗi | fall; fall down | Grade 3b intransitive | feminine faɗuwa |
| gaji | become tired; have had enough | irregular intransitive outside Grade 3b | feminine gajiya |
| wuni | spend the daytime | Grade 3b intransitive, often with a locative | lexical verbal noun related to the noun wuni “daytime” |
| mutu | die | Grade 3b intransitive | feminine mutuwa |
| haihu | give birth; bear a child | Grade 3b intransitive in its core frame | feminine haihuwa |
Yaron ya faɗi daga kan keken, amma bai ji rauni ba.
The boy fell off the bicycle, but he was not injured.
Mun gaji da jiran motar, sai muka tafi a ƙafa.
We got tired of waiting for the bus, so we went on foot.
Baƙin sun wuni a gidanmu kafin su koma Kano.
The visitors spent the day at our house before returning to Kano.
Tsohuwar bishiyar ta mutu bayan fari mai tsawo.
The old tree died after a long drought.
The last example also shows that English die and Hausa mutu can take nonhuman subjects. None of these verbs assigns an agent to its subject in every use: falling, tiring, and dying are changes undergone by the subject.
Why the four object environments do not produce four forms
The object-conditioned A/B/C/D paradigms describe transitive verbs. A basic intransitive such as gaji has one finite frame: its subject becomes tired. Adding a noun, direct-object pronoun, or indirect object immediately after it does not reveal hidden Grade 2-style allomorphs; it produces an ill-formed or differently parsed clause.
| Environment | With basic gaji | Analysis |
|---|---|---|
| No following object | Mun gaji. | well-formed basic intransitive |
| Noun direct object | *Mun gaji aikin. | not a direct-object frame; use gaji da aikin |
| Pronoun direct object | *Aikin ya gaji mu. | not the ordinary basic frame; use a causative derivative |
| Indirect object | *Mun gaji masa. | not licensed by the basic verb |
Mun gaji.
We are tired / have become tired. (no following object)
Mun gaji da aikin yau.
We are tired of today’s work. (da-complement, not direct object)
Aikin yau ya gajiyar da mu.
Today’s work wore us out. (derived transitive causative gajiyar da plus pronoun object)
Doguwar tafiyar ta gajiyar da yaran.
The long journey tired the children. (derived transitive partner plus noun object)
The contrast gaji → gajiyar da is derivational and valency-changing. It is not an object-conditioned final vowel of one invariant English-style verb. Likewise, to express causing death, Hausa normally selects kashe “kill,” not mutu plus an object.
TAM stands before the verb
The final -i/-u remains part of the lexeme under completive, future, and other finite TAM constructions.
Ta gaji bayan tarurruka uku.
She became tired after three meetings.
Za ta gaji idan ba ta huta ba.
She will become tired if she does not rest.
Da ya ga ramin, bai faɗi ba.
When he saw the hole, he did not fall.
English speakers are used to tense-related stem alternations such as fall/fell. Hausa faɗi does not replace -i to encode past time: the preverbal TAM marker does that work. Do not confuse this lexical final vowel with the object-conditioned -i of a Grade 2 C-form either; Grade 2 is transitive and has a different tonal and paradigmatic analysis.
Verbal nouns must be learned verb by verb
Grade 3b does not simply use the final-vowel-lengthening pattern found with core Grade 3 and Grade 3a. Its verbal nouns must be learned lexically and often end in feminine -uwa: faɗuwa “falling,” mutuwa “dying/death,” and haihuwa “giving birth/birth.” Irregular gaji instead has feminine gajiya, also the ordinary noun “tiredness.”
Ganyen mangwaron suna faɗuwa saboda iska mai ƙarfi.
The mango leaves are falling because of the strong wind.
Yana ta gajiya saboda aikin dare.
He keeps getting tired because of the night work. (verbal noun gajiya in a continuative construction)
Bishiyar tana mutuwa a hankali saboda rashin ruwa.
The tree is slowly dying because of lack of water.
Gajiya tana rage iya mayar da hankali.
Fatigue reduces the ability to concentrate. (lexical noun gajiya)
The same spelling can therefore participate in more than one construction. In yana ta gajiya, the continuative frame profiles a developing event; in gajiya tana rage..., gajiya is the feminine subject noun and controls tana. Syntax, not spelling alone, identifies the category.
Derived forms are new lexical members
These verbs may have causative, ventive, totality, or other relatives, but derivation is not automatic. For instance, gajiyar da conventionally means “tire, exhaust,” while faɗo is the Grade 6 ventive of faɗi, describing falling toward or into the relevant deictic scene.
Mangwaron ya faɗo kusa da ƙafata.
The mango fell down near my foot. (ventive faɗo brings the event into the deictic scene)
Hayaniyar ta gajiyar da kowa kafin taron ya ƙare.
The noise exhausted everyone before the meeting ended.
These relationships help organize the lexicon, but they do not license a learner to invent every possible grade member. Verify both form and meaning. A derived form can become conventionalized and may select a complement that the basic intransitive never licenses.
Quick analysis exercise
Classify the bold form before reading the answer.
- Sun mutu: finite basic intransitive; -u belongs to the lexeme, not Grade 7.
- Suna mutuwa: continuative plus verbal noun, not a finite “present ending.”
- Aikin ya gajiyar da su: derived transitive causative with direct-object pronoun.
- Mangwaron ya faɗo: Grade 6 ventive derivative of basic faɗi.
Common Mistakes
1. Treating every -u verb as Grade 7.
❌ Mutu must be passive because it ends in -u.
Incorrect—mutu is a basic intransitive of the peripheral Grade 3b type.
✅ Tsohon dokin ya mutu jiya.
The old horse died yesterday.
2. Giving a basic intransitive a direct object.
❌ Aikin ya gaji mu.
Incorrect for standard basic gaji with a direct object.
✅ Aikin ya gajiyar da mu.
The work exhausted us.
3. Selecting the final vowel by tense.
❌ Faɗi changes its final vowel to express future time.
Incorrect—the future marker precedes the verb.
✅ Zai faɗi idan bai riƙe igiyar ba.
He will fall if he does not hold the rope.
4. Assuming that every final -u is the same morpheme.
❌ Mutu and kamu contain the same Grade 7 suffix in present-day analysis.
Incorrect—mutu is lexically -u, whereas kamu belongs to an affected-subject Grade 7 relation with kama.
✅ Barawon ya kamu, amma tsohon dokin ya mutu.
The thief was caught, but the old horse died.
Key Takeaways
- Many basic -i/-u intransitives form a small Grade 3b class with High–Low tone and a short final vowel, but gaji is a neighboring irregular rather than a formal Grade 3b member.
- Their core forms take no direct object, so noun, pronoun, and indirect-object “forms” are not paradigm cells.
- TAM is preverbal; final -i/-u is not selected for past, present, or future.
- Their lexical verbal nouns include feminine faɗuwa, haihuwa, mutuwa, and irregular gajiya; core Grade 3’s simple final-vowel-lengthening rule does not apply here.
- Causatives and ventives such as gajiyar da and faɗo are derived lexical members whose forms and frames require verification.
Related Topics
- Grade 0 and Irregular Derived PatternsC1 — Use Grade 0 as a precise residual classification while learning the object frames, verbal nouns, and derived forms of exceptional verbs lexically.
- High-High Intransitives in -aC1 — Identify the small Grade 3a-type class of intransitive -a verbs whose heavy first syllable conditions an all-High melody.
- Grade 3 Intransitives: OverviewB2 — Recognize canonical Grade 3 as an intransitive short-a class and distinguish locative complements, pre-dative forms, verbal nouns, and derived transitive relatives.
- The Three Object EnvironmentsA2 — Choose Hausa verb forms by whether no object, a noun direct object, or a direct-object pronoun immediately follows, while treating indirect objects separately.
- Verbal Nouns and Grade MembershipA2 — Use Hausa verb grades to anticipate verbal-noun patterns while learning the strong, weak, and sometimes multiple forms each lexical verb actually permits.
- Paired Grades and Valency AlternationC1 — Analyze transitive–intransitive and causative–result pairs by tracking participant roles, grade form, and the lexical limits of each alternation.