Ng'ombe ni mamalia.

A common learner-friendly approximation is ng-OM-beh, but the important part is the beginning:

• ng' is pronounced like the ng at the end of sing
• you go straight into o
• the apostrophe shows you should not pronounce a hard g sound

So it is closer to ŋombe than to n-gombe.

Also, Swahili vowels are usually pronounced clearly and consistently:

• o = oh
• e = eh

It helps show the pronunciation of ng'.

In Swahili spelling:

• ng often has a hard g sound in it
• ng' usually means the nasal sound /ŋ/, like the end of sing

So the apostrophe is there to guide pronunciation and prevent you from reading it with a hard g.

It can cover more than one English word, depending on context.

Ng'ombe is often used for:

• cow
• ox / bull in some contexts
• cattle as a general category

So in a general statement like Ng'ombe ni mamalia, it is best understood as a broad animal-category word, not necessarily only one female cow.

It can be both singular and plural.

That is very normal in Swahili for some nouns. The form ng'ombe does not change between singular and plural, so context tells you which one is meant.

For example, depending on context, the sentence could be understood like:

• A cow is a mammal
• Cows are mammals
• Cattle are mammals

English forces you to choose singular or plural more clearly than Swahili often does.

Ni is the copula here, meaning is / are / am in the sense of identity or classification.

So:

• Ng'ombe ni mamalia = A cow is a mammal / Cows are mammals

A useful thing to remember is that ni does not change the way English am / is / are do. The same ni is used with different subjects in this type of sentence.

Not in every situation.

Ni is especially used when one thing is being identified or classified as another thing:

• Yeye ni mwalimu = He/She is a teacher
• Ng'ombe ni mamalia = A cow is a mammal

But English to be has other uses too, especially for location or existence, and Swahili often uses different structures for those.

So it is best to think of ni as the word used for X is Y type sentences.

Because Swahili normally does not use articles the way English does.

So Ng'ombe ni mamalia is literally closer to:

• Cow is mammal
• Cattle are mammals

But natural English needs articles or clearer number marking, so the translation becomes:

• A cow is a mammal
• The cow is a mammal
• Cows are mammals

Which one is best depends on context.

In modern Swahili, mamalia is commonly used as the category name mammal / mammals, especially in scientific or dictionary-style language.

In a sentence like this, the main idea is classification:

• ng'ombe belongs to the category mamalia

That is why English may translate it as either:

• a mammal
• mammals

depending on whether the English version is singular or generic plural.

Yes, it is very similar here.

The pattern is:

• Ng'ombe = subject
• ni = is/are
• mamalia = category/class

So the structure is basically:

subject + ni + noun

That makes this sentence a very useful beginner pattern in Swahili:

• X ni Y = X is Y