Ni vizuri kumsalimia mtu mkubwa kwa heshima.

Ni here works like it is in English. It introduces a general statement:

• Ni vizuri = It is good
• So Ni vizuri kumsalimia mtu mkubwa kwa heshima means something like It is good to greet an elder respectfully.

In sentences like this, ni does not refer to a specific thing. It just helps make a general statement about what is good, bad, important, and so on.

Vizuri is an adverb, and in this expression it means well, properly, or more naturally good / a good thing.

In the fixed phrase:

• Ni vizuri = It is good

This is a very common structure in Swahili. Even though vizuri often functions like well, in this kind of sentence the whole phrase means it is good or it is proper.

Compare:

• Ni vizuri kusoma = It is good to study
• Anaimba vizuri = He/she sings well

So in your sentence, vizuri is part of the common expression Ni vizuri...

The infinitive idea is contained in kumsalimia.

The basic infinitive verb is:

• kusalimia = to greet

Swahili infinitives usually begin with ku-. So:

• ku- = infinitive marker
• salimia = greet

In this sentence, the infinitive has an object marker added inside it:

• ku-m-salimia
• to-greet-him/her

So kumsalimia mtu mkubwa literally looks like to greet him/her, an elder, though in natural English we simply say to greet an elder.

The m is an object marker. It stands for him/her and agrees with mtu mkubwa.

So:

• kusalimia = to greet
• kumsalimia = to greet him/her

Because mtu belongs to the noun class that uses m- for singular human nouns, the object marker is also m-.

This is very common in Swahili: the verb often includes an object marker even when the noun itself is also stated.

So:

• kumsalimia mtu mkubwa = to greet an elder

Literally, it is closer to:

• to greet him/her, an elder

That may feel redundant to an English speaker, but it is normal in Swahili.

Both can be possible in some contexts, but kumsalimia mtu mkubwa sounds more complete and natural because the object marker m- ties the action directly to the person being greeted.

Swahili often uses both:

1. an object marker on the verb, and
2. the full noun after the verb

This can make the sentence sound more specific or more smoothly connected.

So:

• kusalimia mtu mkubwa = to greet an elder
• kumsalimia mtu mkubwa = to greet an elder / to greet him or her, an elder

The version with m- is very natural, especially when talking about a person.

Literally:

• mtu = person
• mkubwa = big, great, important, older

So word-for-word, mtu mkubwa could look like big person. But in actual usage, it often means:

• an elder
• an important person
• a grown-up / adult, depending on context

In this sentence, the meaning is clearly an elder or an older person deserving respect.

This is a good example of how mkubwa is broader than English big. With people, it often carries the idea of age, status, or importance, not physical size.

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

So:

• mtu mkubwa = elder / important person / big person
• literally person big/elder

This is normal Swahili word order. English usually puts adjectives before nouns, but Swahili usually puts them after.

More examples:

• mtoto mdogo = small child
• nyumba kubwa = big house
• watu wazuri = good people

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

Here the noun is:

• mtu = person

The singular human noun class often uses m- on adjectives, so:

• -kubwa becomes mkubwa

If the noun were plural:

• watu wakubwa = elders / important people / grown-ups

So the adjective changes to match the noun:

• mtu mkubwa
• watu wakubwa

Kwa heshima means with respect or respectfully.

Breakdown:

• kwa = by, with, in, through, in the manner of
• heshima = respect

So:

• kwa heshima = with respect
• naturally in English: respectfully

This is a common Swahili way of expressing manner: using kwa + noun.

Examples:

• kwa makini = carefully
• kwa upendo = with love
• kwa furaha = happily / with joy

So kumsalimia mtu mkubwa kwa heshima means to greet an elder in a respectful way.

Yes, in some contexts Swahili allows some flexibility, but the version here is very natural:

• Ni vizuri kumsalimia mtu mkubwa kwa heshima.

It keeps the core idea together:

1. Ni vizuri = it is good
2. kumsalimia mtu mkubwa = to greet an elder
3. kwa heshima = respectfully

If you move kwa heshima, the sentence may still be understandable, but this order is smooth and standard.

It expresses a general judgment or advice: it is good/proper to...

So it is softer than a direct command.

Compare the feeling:

• Ni vizuri kumsalimia mtu mkubwa kwa heshima.
  = It is good / proper to greet an elder respectfully.

A stronger instruction might use another structure, such as something closer to you should or a direct command. But Ni vizuri... is a polite, general way to say what is right or appropriate.

Yes, very much so.

The sentence is not only grammatical; it also reflects an important social value in many Swahili-speaking contexts: showing respect to older people or socially senior people.

That is why:

• mtu mkubwa is more than just big person
• kwa heshima is an important part of the sentence

So the sentence carries both a language lesson and a cultural idea: greeting elders respectfully is considered proper behavior.

A helpful breakdown is:

• Ni vizuri = It is good
• kum-salimia = to greet him/her
• mtu mkubwa = an elder
• kwa heshima = respectfully / with respect

So the full structure is:

• It is good + infinitive phrase + manner phrase

In a more formula-like way:

• Ni vizuri + ku-verb + object + kwa + noun

This pattern is very useful in Swahili. You can build many similar sentences:

• Ni vizuri kusaidia wengine. = It is good to help others.
• Ni vizuri kuongea kwa upole. = It is good to speak gently.
• Ni vizuri kuwaheshimu wazazi. = It is good to respect parents.