Negative Relative Forms | Swahili Grammar

Swahili has a dedicated negative-relative pattern for meanings such as “a person who does not…,” “things that are not…,” and “a place where there is no….” In mtu asiyefika kwa wakati “a person who does not arrive on time,” the negative and the equivalent of English who are both built into asiyefika. You cannot normally make this form by placing one free word meaning not before an unchanged affirmative relative.

The central pattern is subject marker + -si- + relative concord + verb stem. It has no ordinary tense marker and therefore receives its time interpretation from context. Unless labelled otherwise, the construction is neutral in both (informal) speech and (formal) Standard Swahili.

The affirmative-to-negative replacement

Compare an affirmative present relative with its negative counterpart:

Meaning	Affirmative	Negative	What changes
person who (does not) arrive	a-na-ye-fik-a	a-si-ye-fik-a	-na- is replaced by -si-
people who (do not) wait	wa-na-o-subir-i	wa-si-o-subir-i	-na- is replaced by -si-
device that does (not) work	ki-na-cho-fany-a	ki-si-cho-fany-a	-na- is replaced by -si-
instructions that are (not) clear	ya-na-yo-elewek-a	ya-si-yo-elewek-a	-na- is replaced by -si-

The hyphens expose the slots only; normal spelling is anayefika, asiyefika, kinachofanya, and kisichofanya. The initial marker and the relative concord agree with the same head in a subject relative: class 1 mtu gives a-…-ye-, while class 7 kifaa gives ki-…-cho-.

Mfanyakazi anayefika mapema hufungua ofisi; asiyefika kwa wakati humpigia msimamizi simu.

The employee who arrives early opens the office; one who does not arrive on time calls the supervisor.

Kifaa kinachofanya kazi kina taa ya kijani; kisichofanya kazi kina taa nyekundu.

A device that works has a green light; one that does not work has a red light.

Maagizo yanayoeleweka yamebandikwa mlangoni, lakini yale yasiyoeleweka yatarekebishwa.

The instructions that are clear have been posted on the door, but those that are unclear will be revised.

💡

Do not memorize asiye- as an invariant word for “who does not.” It is only the class 1 outcome of a productive template. Change the head noun, and both the initial subject marker and the relative concord may change.

The complete noun-class series

The following table shows the negative opening before a verb stem. Classes 11 and 14 share usio-; classes 15 and 17 share kusiko-.

Class	Typical controller	Negative relative	Analytic build
1	mtu	asiye-	a-si-ye-
2	watu	wasio-	wa-si-o-
3	mti	usio-	u-si-o-
4	miti	isiyo-	i-si-yo-
5	jambo	lisilo-	li-si-lo-
6	mambo	yasiyo-	ya-si-yo-
7	kitu	kisicho-	ki-si-cho-
8	vitu	visivyo-	vi-si-vyo-
9	barua, singular	isiyo-	i-si-yo-
10	barua, plural	zisizo-	zi-si-zo-
11	ulimi	usio-	u-si-o-
14	utoto	usio-	u-si-o-
15	kusubiri	kusiko-	ku-si-ko-
16	specific place	pasipo-	pa-si-po-
17	general place	kusiko-	ku-si-ko-
18	interior	msimo-	m-si-mo-

Tunatafuta njia isiyokuwa na foleni nyingi asubuhi.

We are looking for a route that does not have much traffic in the morning.

Wateja wasio na risiti waende kwenye dawati la huduma.

Customers who do not have a receipt should go to the service desk.

Tusihifadhi dawa mahali pasipofikiwa na hewa safi.

Let us not store medicine in a place that fresh air does not reach.

The locative rows are real Standard forms, but class 18 msimo- is comparatively uncommon in everyday production. Speakers often recast a dense locative relative with ambapo, ambako, or ambamo, especially in (formal) prose where an explicit finite clause is easier to process. That is a genuine usage asymmetry, not a defect in the paradigm.

Time comes from context

Unlike affirmative anayefika “who is arriving/arrives,” aliyefika “who arrived,” and atakayefika “who will arrive,” the simple negative relative asiyefika contains no -na-, -li-, or future -taka-. It can describe a general non-event or take its time from a surrounding adverb or clause.

Usimpe ufunguo mtu asiyefanya kazi hapa.

Do not give the key to a person who does not work here.

Jana tuliwasubiri wageni wasiofika hadi mkutano ulipoisha.

Yesterday we waited for guests who did not arrive before the meeting ended.

Kesho abiria wasiowasilisha vitambulisho hawataruhusiwa kupanda basi.

Tomorrow passengers who do not present identification will not be allowed to board the bus.

The forms wasiofika and wasiowasilisha have the same tenseless architecture. Jana and the past narrative supply the past reading in the first; kesho and hawataruhusiwa supply the future frame in the second. This compactness is useful, but it can become ambiguous when the precise time relation matters.

💡

A negative relative does not secretly contain present tense. Treat it as time-neutral unless another expression fixes the time. For an explicit negative perfect, past, or future, the separate amba- strategy is usually clearer.

Use amba- when tense or aspect must be explicit

An amba- relative puts class agreement on a separate relative word and lets the following verb use its ordinary negative paradigm. This is particularly useful for -ja- “not yet/perfect negative,” past -ku-, future -ta-, habitual hu-, and compound aspect.

Mgeni ambaye hajafika ametuma ujumbe kwamba atachelewa.

The guest who has not yet arrived has sent a message saying that they will be late.

Wanafunzi ambao hawakuwasilisha kazi jana wamepewa siku moja zaidi.

The students who did not submit the assignment yesterday have been given one more day.

Gari ambalo halitaondoka leo litafanyiwa ukaguzi kesho.

The vehicle that will not leave today will be inspected tomorrow.

In ambaye ha-ja-fik-a, ambaye links the clause to class 1 mgeni, while hajafika independently marks negative perfect. In ambao hawa-ku-wasilish-a, ambao agrees with class 2 wanafunzi and hawakuwasilisha marks a completed negative past. Do not add an incorporated relative concord inside those finite verbs as well.

Object relatives keep two controllers apart

In a negative object relative, the first subject marker identifies the actor, while the relative concord identifies the head noun being affected. An object marker may follow the relative concord when the discourse calls for it.

Barua nisiyoipata kwenye faili huenda ilitumwa kwa anwani nyingine.

A letter that I cannot find in the file may have been sent to another address.

The build is ni-si-yo-i-pat-a: ni- “I” is the embedded subject, -si- is negative, -yo- points to class 9 barua, and -i- resumes it as object. By contrast, subject-relative barua isiyofika begins with class 9 subject i-. The same surface sequence isiyo- can therefore be part of different larger structures; slot-by-slot analysis prevents guessing.

Hatutalipia huduma tusizozitumia mwezi huu.

We will not pay for services that we do not use this month.

Here tu-si-zo-zi-tumi-a contains first-person plural subject tu-, class 10 relative -zo-, and class 10 object -zi-.

Common Mistakes

Adding free si before an affirmative relative

❌ Tunahitaji fundi si anayesahau vifaa muhimu.

Incorrect — free copular si does not negate the affirmative relative anayesahau.

✅ Tunahitaji fundi asiyesahau vifaa muhimu anapoenda kazini.

We need a technician who does not forget the necessary tools when going to work.

Keeping the affirmative present marker

❌ Epuka programu inasiyohifadhi mabadiliko.

Incorrect — the intended class 9 form cannot retain affirmative -na- beside negative -si-.

✅ Epuka programu isiyohifadhi mabadiliko kiotomatiki.

Avoid a program that does not save changes automatically.

Using class 1 asiye- for every noun

❌ Tumeondoa viti asiyokuwa salama.

Incorrect — class 8 viti requires vi-si-vyo-, not class 1 a-si-ye-.

✅ Tumeondoa viti visivyokuwa salama kwa watoto.

We have removed chairs that are not safe for children.

Forcing a precise past reading into a tenseless form

❌ Mteja asiyelipa amerudi leo.

Time-neutral and therefore unclear if the intended meaning is one specific missed payment yesterday.

✅ Mteja ambaye hakulipa jana amerudi leo.

The customer who did not pay yesterday has returned today.

Key Takeaways

The negative relative is a class-agreeing verb pattern: subject marker + -si- + relative concord + stem. Its negative marker replaces affirmative relative TAM rather than being added beside it, and its time reading is normally contextual. Use the full asiye-/wasio-/kisicho- series according to the head noun; use amba- plus a normally inflected negative verb when past, future, perfect, habitual, or compound aspect must be explicit. For the affirmative architecture behind the concords, see the relative concord table; for the separate strategy, see the amba- series.

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