Swahili often expresses a portion or quantity with an ordinary noun as the head: sehemu “part/section,” kiasi “amount/measure,” lita “liter/liters,” kilo “kilogram/kilograms,” or a container such as kikombe “cup.” The measured substance or set follows an agreeing associative linker: sehemu ya paa, kiasi cha chumvi, and lita za mafuta.
This matters for agreement. English speakers tend to treat “part of,” “an amount of,” and measurement expressions as loose quantifiers, but in Swahili the measure word can control demonstratives, adjectives, associative -a, and the predicate. Some member-partitives allow meaning-based agreement with an animate plural complement; that real variation must be distinguished from careless concord mixing.
Sehemu: a bounded part or section
Sehemu is normally a class 9 noun in the singular and class 10 in the plural. It can name a physical part, a section of a text or organization, or a portion abstracted from a whole.
Sehemu ya dari imeharibika baada ya mvua kubwa.
Part of the ceiling has been damaged after the heavy rain.
Sehemu mbili za barabara zimefungwa kwa ajili ya matengenezo.
Two sections of the road have been closed for repairs.
Singular class 9 sehemu selects associative ya and subject marker i- in imeharibika. Plural class 10 sehemu selects numeral mbili, associative za, and subject marker zi- in zimefungwa. Although the noun looks identical in both numbers, the concord chain makes the number visible.
Tutajadili sehemu ya mwisho ya mkataba baada ya chakula cha mchana.
We will discuss the final section of the contract after lunch.
Here sehemu names a structurally identifiable section, not an approximate amount. Its adjective ya mwisho and both associative linkers use class 9 ya.
Kiasi: an amount, degree, or limited quantity
Kiasi is a class 7 noun. It packages material or an abstract property as an amount, so its own modifiers and predicate use class 7 concord: kiasi hiki kidogo... kinatosha. Its associative linker is cha.
Kiasi hiki cha dawa kinatosha kwa siku tatu.
This amount of medicine is enough for three days.
Waliongeza kiasi kidogo cha maji ili mchuzi usiwe mzito sana.
They added a small amount of water so that the sauce would not be too thick.
Kiasi cha fedha kilichobaki kimewekwa kwenye akaunti ya dharura.
The amount of money that remained has been placed in the emergency account.
Class 7 agreement appears as hiki, kidogo, cha, kili- and ki-. The class 6 noun maji or class 9 fedha does not control the outer phrase. Inside a further modifier of the complement, however, that complement can start its own domain: kiasi cha maji yaliyo safi “an amount of water that is clean,” where relative yali- belongs to maji.
Kwa kiasi means “to some extent/in moderation,” and kupita kiasi means “excessively/beyond measure.” These are established adverbial expressions rather than noun phrases selecting a measured complement.
Bei zimeongezeka kwa kiasi, lakini usafiri bado unaweza kugharimiwa.
Prices have increased somewhat, but transport can still be paid for.
This (formal) use evaluates degree; no following cha + noun is required.
Units and containers as grammatical heads
Exact measurements use the unit as the head, followed by an associative linker that agrees with that unit. Class 9/10 loanwords such as kilo and lita typically show number through concord and numerals rather than changing the noun form.
Lita moja ya mafuta imemwagika karibu na pampu.
One liter of fuel has spilled near the pump.
Lita nne za maziwa zimewekwa kwenye friji ndogo.
Four liters of milk have been put in the small refrigerator.
Singular lita moja controls ya and i- in imemwagika. Plural lita nne controls za and zi- in zimewekwa. The class 6 complement mafuta or maziwa names the substance but does not replace the unit as the outer head.
Containers follow their own noun classes:
Vikombe viwili vya unga vinatosha kutengeneza mikate hii.
Two cups of flour are enough to make these loaves.
Mifuko mitatu ya mchele imefika dukani asubuhi hii.
Three sacks of rice arrived at the shop this morning.
Class 8 vikombe gives viwili, vya, and vi-; class 4 mifuko gives mitatu, ya, and i-. The associative form is not a universal ya. Consult the associative concord table rather than guessing from English “of.”
Count and mass complements
Mass nouns naturally combine with amounts and units: kiasi cha sukari, lita za maji, kilo za unga. Count nouns can also be measured when weight, volume, or packaged quantity is relevant: kilo mbili za nyanya “two kilograms of tomatoes.” If individual objects matter, a cardinal construction is more direct: nyanya kumi “ten tomatoes.”
Tulinunua kilo mbili za nyanya kwa supu ya wageni.
We bought two kilograms of tomatoes for the guests' soup.
The phrase counts kilograms, not tomatoes. Consequently, class 10 agreement would resume the quantity: zimetosha “they have been enough.” This semantic difference explains why translating only the English noun closest to the verb can produce the wrong concord.
Head agreement and member agreement
With a concrete section or measured quantity, head agreement is the safest and most transparent Standard Swahili analysis: sehemu imefungwa, kiasi kimebaki, lita zimetosha. A different pattern occurs when a singular partitive expression denotes members of an animate plural group. Speakers may let the people control plural human agreement because the clause predicates an action of those individuals.
Sehemu ya wafanyakazi wameamua kuendelea na mgomo.
A portion of the workers have decided to continue the strike.
Plural wa- foregrounds the workers as individual decision-makers. Singular sehemu ... imeamua packages the subgroup as one corporate portion and is also structurally interpretable, especially in (formal) organizational prose. This is a genuine choice of semantic center, not permission to mix concords randomly within one chain. If the intended meaning is simply “some workers,” baadhi ya wafanyakazi wameamua is usually clearer.
Position in expanded phrases
Because sehemu and kiasi are nouns, possessives, demonstratives, numerals, and adjectives follow them in the regular noun-phrase chain. The associative complement comes after the modifiers that delimit the measure head.
Sehemu zetu hizi mbili kubwa za bustani zimefunguliwa kwa wageni.
These two large sections of our garden have been opened to visitors.
Class 10 sehemu controls zetu, hizi, mbili, kubwa, za, and zi- in zimefunguliwa. A class 7 amount has a different chain:
Kiasi chetu hiki kidogo cha unga kitatumika kutengeneza mchuzi.
This small amount of flour of ours will be used to make the sauce.
Here the sequence is kiasi + chetu + hiki + kidogo + cha unga, all anchored by class 7 kiasi. Such full stacks are possible for contrast in (formal) explanation, but a speaker would normally omit modifiers that the context does not need.
Common Mistakes
Letting the substance control a measure phrase
❌ Kiasi cha maziwa yamebaki kwenye chupa.
Incorrect under the amount-head reading — class 7 kiasi requires kimebaki.
✅ Kiasi cha maziwa kimebaki kwenye chupa ya pili.
An amount of milk remains in the second bottle.
Using ya after every measure word
❌ Vikapu vitatu ya machungwa vimeuzwa.
Incorrect — class 8 vikapu requires associative vya.
✅ Vikapu vitatu vya machungwa vimeuzwa sokoni leo.
Three baskets of oranges have been sold at the market today.
Missing number agreement with an unchanged unit noun
❌ Kilo tano ya sukari imetosha kwa sherehe.
Incorrect — the five class 10 kilograms require za and zimetosha.
✅ Kilo tano za sukari zimetosha kwa sherehe ya kesho.
Five kilograms of sugar have been enough for tomorrow's celebration.
Treating quantity words as articles
❌ Nipe kiasi kitabu cha maelekezo.
Incorrect — kiasi is an amount noun, not an indefinite article before a count noun.
✅ Nipe kitabu cha maelekezo kilicho juu ya meza.
Give me an instruction book that is on the table.
Key Takeaways
Sehemu names a part or section, class 7 kiasi packages an amount, and units or containers head measured phrases. Each head selects its own modifiers, associative linker, and normal predicate agreement. The complement begins a separate agreement domain. Animate member-partitives may shift predicate agreement toward the people, but exact measure phrases and physical sections retain head control. There is no general article or invariant “of”: every visible concord reflects the grammatical head chosen for that layer.
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Start learning Swahili →Related Topics
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- fulani: A Certain or UnspecifiedB1 — Use invariant postnominal fulani for a particular but unnamed or unspecified referent, and distinguish it from -moja and -o-ote.
- Agreement inside Quantified Noun PhrasesB2 — Identify whether a counted noun, container, measure, or partitive complement controls each Swahili concord chain.
- The Associative -a Concord: Complete TableA2 — Use the class-agreeing forms of associative -a to link a Swahili noun with its owner, origin, purpose, material, or defining property.
- Count, Mass and Collective ReadingsB1 — Distinguish count nouns from class 6 and class 14 mass nouns, then express portions, containers, types, and collective readings naturally.