Uhaba wa maji ni tatizo kubwa.

A word-by-word breakdown is:

• uhaba = shortage, scarcity, lack
• wa = of (in this kind of phrase)
• maji = water
• ni = is
• tatizo = problem
• kubwa = big, large, serious

So the whole sentence means something like Water scarcity is a big problem or The lack of water is a big problem.

Here, wa links uhaba and maji, so uhaba wa maji means scarcity of water.

This linking word comes from -a, often called the associative or genitive connector. It changes form depending on the noun class of the first noun.

So:

• uhaba = the head noun
• wa maji = of water

That is why the phrase means scarcity of water, not just scarcity water.

Because in Swahili, when one noun describes another with the meaning of, you usually need a connector.

So:

• uhaba wa maji = scarcity of water
• not uhaba maji

English sometimes allows noun+noun combinations like water shortage, but Swahili commonly uses the of structure here.

Maji is a mass noun meaning water. In English, water is uncountable, and maji works similarly in meaning, even though grammatically it belongs to a noun class that often looks plural.

Important point: you should usually just learn maji as the normal word for water. There is no everyday singular form used the way English has a water or something similar.

So in this sentence, maji simply means water.

Ni is the copula here, meaning is.

So:

• Uhaba wa maji ni tatizo kubwa
• Water scarcity is a big problem

In simple identification/equational sentences, ni is very common. It does not change the way English am / is / are does.

Examples:

• Huyu ni mwalimu = This is a teacher
• Juma ni daktari = Juma is a doctor

In Swahili, adjectives usually come after the noun they describe.

So:

• tatizo kubwa = big problem
• literally, problem big

That is normal Swahili word order.

Because adjectives in Swahili often agree with the noun class of the noun they describe.

Tatizo is a class 5 noun, and with -kubwa, the correct singular form here is kubwa.

So:

• tatizo kubwa = big problem
• plural: matatizo makubwa = big problems

That contrast helps show the agreement:

• tatizo kubwa
• matatizo makubwa

Swahili does not have articles like English a, an, and the.

So tatizo kubwa can mean:

• a big problem
• the big problem

The exact meaning depends on context.

Likewise, uhaba wa maji can be understood as:

• water scarcity
• the lack of water
• a shortage of water

Context tells you which translation sounds best in English.

Yes. Uhaba is a flexible noun. Depending on context, it can be translated as:

• scarcity
• shortage
• lack

So this sentence could be rendered in several natural ways:

• Water scarcity is a big problem
• A shortage of water is a big problem
• Lack of water is a big problem

All are reasonable.

Yes, sometimes, if you want a different emphasis.

For example:

• Uhaba wa maji ni tatizo kubwa = Water scarcity is a big problem
• Tatizo kubwa ni uhaba wa maji = The big problem is water scarcity

Both are grammatical, but they focus attention differently. The original sentence is the most straightforward way to say it.

A simple pronunciation guide is:

u-HA-ba wa MA-ji ni ta-TI-zo KU-bwa

A few tips:

• Swahili vowels are usually pure and consistent:
  • a as in father
  • i as in machine
  • u as in flute
• j is pronounced like the j in jam
• bw in kubwa is pronounced together, roughly kbwa / koob-wa

Swahili pronunciation is generally quite regular, so once you know the sounds, it is easier to read aloud than English.

If you are studying grammar, this sentence is a good example of noun classes:

• uhaba: class 11, an abstract noun
• maji: class 6
• tatizo: class 5
• kubwa agrees with tatizo
• wa is the associative form used here with uhaba

You do not need to master all of that at once, but it helps explain why the forms are what they are.

The most natural general translation is:

Water scarcity is a big problem.

Depending on context, you could also say:

• Lack of water is a big problem.
• A water shortage is a big problem.

If you are learning the sentence as a model, Water scarcity is a big problem is probably the best version to remember.