Rahma ni mwaminifu kwa marafiki zake.

Ni is the copula, the word used for is / are in simple identification or description.

So:

• Rahma ni mwaminifu = Rahma is faithful / loyal / trustworthy

In many present-tense sentences, Swahili does not need a separate word for is, but with this kind of noun-like predicate, ni is very common and natural.

Mwaminifu means a faithful/loyal/trustworthy person. It often behaves more like a noun describing a person than like a basic adjective.

The prefix mw- is associated with a singular human being, so mwaminifu fits Rahma, who is one person.

Compare:

• mwaminifu = one faithful person
• waaminifu = faithful people

So if you were talking about more than one person, you might say:

• Rahma na Asha ni waaminifu.
  Rahma and Asha are faithful/loyal.

Here kwa means something like to, toward, or in relation to.

So:

• mwaminifu kwa marafiki zake = faithful/loyal to her friends

This is a common pattern in Swahili: a quality is followed by kwa to show the person or group receiving that attitude.

So the sentence is not just saying Rahma is generally trustworthy, but specifically that she is loyal to her friends.

Marafiki means friends, and zake means his/her/their, depending on context.

So:

• marafiki zake = his/her friends

In this sentence, because the subject is Rahma, we understand it as her friends.

A very important point for English speakers:
Swahili does not usually mark his versus her the way English does. The same form can cover both, and context tells you which one is meant.

Because Swahili possessives agree with the thing possessed, not with the owner’s gender.

Here, the possessed noun is marafiki (friends), so the possessive takes the matching agreement form: zake.

That means zake does not tell you whether the owner is male or female. It just tells you that the word belongs with marafiki.

So:

• marafiki zake can mean his friends or her friends
• in this sentence, context tells us it is her friends

It is plural here: friends.

The singular is:

• rafiki = friend

The plural is:

• marafiki = friends

So:

• rafiki yake = his/her friend
• marafiki zake = his/her friends

Yes. Depending on context, mwaminifu can be translated as:

• faithful
• loyal
• trustworthy

In this sentence, because of kwa marafiki zake, the sense of loyal / faithful to her friends is especially natural.

Without more context, English could choose slightly different words, but the basic idea is that Rahma is dependable and true in her relationship to her friends.

Yes, this is very normal.

The structure is:

• Rahma — subject
• ni — copula
• mwaminifu — description
• kwa marafiki zake — phrase showing to whom

So it follows a straightforward pattern similar to English:

• Rahma is loyal to her friends.

Swahili often uses this kind of clear subject + predicate order in simple statements.

You could, but the meaning would become more general or depend on earlier context.

For example:

• Ni mwaminifu kwa marafiki zake.

This can work in conversation if it is already clear who you are talking about. But by itself, it is less explicit than the full sentence with Rahma.

Swahili often allows subjects to be omitted when context makes them obvious, but including the name is the clearest option for learners.

A helpful breakdown is:

• mwa-mi-ni-fu

The beginning mw- may feel unusual for English speakers. Try saying it smoothly as one cluster:

• mwa like mwah without extra vowels inserted

So do not turn it into something like moo-aminifu. Keep mw together as much as possible.

A rough guide:

• Rahma ni mwaminifu kwa marafiki zake
• RAH-ma nee mwa-mi-NEE-foo kwa ma-ra-FEE-kee ZAH-keh

The exact accent varies, but saying each vowel clearly is a good Swahili habit.

The strongest reading is loyal / faithful to her friends.

Because of kwa marafiki zake, the sentence points to Rahma’s relationship toward her friends. That makes loyal or faithful the best fit in most situations.

If you wanted to emphasize honest with her friends, Swahili would usually use a different wording.

So for learners, the safest interpretation here is:

• Rahma is loyal/faithful to her friends.