Mkataba wa bima una muda wa mkataba wa bima.

A useful breakdown is:

Mkataba = contract
wa bima = of insurance / insurance
una = it has
muda = duration, period, term
wa mkataba wa bima = of the insurance contract

So the structure is roughly:

Mkataba wa bima + una + muda wa mkataba wa bima

Literally, it is something like Insurance contract has duration of insurance contract.

In both places, wa is the connector meaning something like of.

Swahili often links two nouns this way:

• mkataba wa bima = contract of insurance = insurance contract
• muda wa mkataba wa bima = duration of the insurance contract

So the first wa links mkataba and bima, and the second wa links muda and mkataba wa bima.

Here una means it has.

It comes from:

• u- = the subject marker for this noun class
• -na- = have / with

So mkataba wa bima una... means the insurance contract has...

This is not the verb to be. If it were ni, the meaning would be is, not has.

Because mkataba belongs to a noun class that takes the subject marker u- in the singular.

So:

• mkataba una... = the contract has...
• mtu ana... = the person has...
• kitabu kina... = the book has...

This is a noun-class agreement issue. In Swahili, the verb changes to match the noun class of the subject.

No. Bima is a noun, meaning insurance.

Swahili often uses a noun + wa + noun pattern where English might use:

• an adjective, or
• a compound noun

So mkataba wa bima is literally contract of insurance, but in natural English we usually say insurance contract.

Because Swahili normally puts the head noun first and the modifier after it.

So:

• mkataba wa bima = contract of insurance
• muda wa mkataba wa bima = duration of the insurance contract

This is different from English, where we often put one noun directly before another, as in insurance contract.

Swahili does not use articles like English does.

So mkataba can mean:

• a contract
• the contract

The exact meaning depends on context. The same is true for mkataba wa bima: it could mean an insurance contract or the insurance contract, depending on the situation.

It belongs with muda.

So the ending should be grouped like this:

muda wa mkataba wa bima

That whole phrase means the duration/term of the insurance contract.

It does not go directly with una. The verb is just una = has, and what it has is the whole noun phrase muda wa mkataba wa bima.

It is grammatical, but it sounds repetitive because mkataba wa bima appears twice.

That kind of repetition can happen in formal, legal, or technical language, where clarity is more important than style. In everyday language, a speaker might avoid repeating the whole phrase if the context is already clear.

So the sentence is understandable and correct, but stylistically it is a bit heavy.

The singular mkataba becomes mikataba.

With that change, the agreements also change:

• mkataba wa bima una... = the insurance contract has...
• mikataba ya bima ina... = the insurance contracts have...

Notice the changes:

• wa becomes ya
• una becomes ina

That happens because the noun class changes from singular to plural.