Sanduku lenye barua muhimu liko mezani.

Lenye means something like that has, containing, or with.

In sanduku lenye barua muhimu, it links sanduku (box) to barua muhimu (important letters) and gives the idea:

the box that has important letters
or more naturally in English, the box with important letters

It comes from -enye, a form often used to mean having or with, plus noun-class agreement.

You can often use na for with, but lenye is more specifically tied to the noun and means which has or that contains.

So:

• sanduku na barua muhimu = a box with important letters
• sanduku lenye barua muhimu = a box that has important letters

The second version is a little more descriptive and grammatical in the sense of a relative construction. It is very natural when you are identifying or describing the noun.

Because sanduku belongs to noun class 5 in the singular, and class 5 uses the agreement prefix li-.

So the sentence shows agreement with sanduku in more than one place:

• sanduku → class 5 singular
• lenye → agrees with sanduku
• liko → also agrees with sanduku

This is very common in Swahili: once you know the noun class of the main noun, other words connected to it often change to match it.

Liko means is located or is there.

In this sentence, liko mezani means is on the table / is at the table.

It is made of:

• li- = agreement with sanduku (class 5)
• -ko = a locative form used for being in a place

So liko is not just a plain is like English. It specifically expresses location.

Because ni is usually used for identity or classification, not location.

For example:

• Huyu ni mwalimu. = This person is a teacher.
• Sanduku liko mezani. = The box is on the table.

When you want to say where something is, Swahili commonly uses forms like yuko, iko, liko, ziko, etc., depending on the noun class.

So Sanduku ni mezani would not be the normal way to say it.

Mezani means on the table, at the table, or sometimes more generally on/at/in the table area, depending on context.

It is formed from:

• meza = table
• -ni = a locative suffix

So:

• meza = table
• mezani = at/on the table

This -ni ending is very common in Swahili for locations.

Often, yes, that is the most natural translation in a sentence like this. But the locative -ni can be a little broader than English on.

Depending on context, mezani can mean:

• on the table
• at the table
• by the table

If you want to be very explicit about on top of, Swahili can also say juu ya meza.

So liko mezani is perfectly normal, but it is slightly more general than a word-for-word English on.

It can be either in form, because barua has the same shape in both singular and plural.

So barua can mean:

• a letter
• letters

The context tells you which one is intended. In your sentence, if the meaning shown to the learner is letters, then that is how it should be understood here.

This is normal for many Swahili nouns in the N class: singular and plural often look the same.

Because barua belongs to a noun class where singular and plural are often identical in form.

So unlike nouns such as:

• mtoto → watoto
• kitabu → vitabu

you get nouns like:

• barua → barua

The grammar around the noun may help show number in other sentences, but the noun itself often stays the same.

It describes barua (letters), not sanduku (box).

So the structure is:

• sanduku = box
• lenye barua muhimu = that has important letters

This means the sentence is talking about a box containing important letters, not an important box.

If you wanted to say the important box, you would make important describe sanduku instead.

Because muhimu is one of the adjectives that often stays the same across different noun classes.

Some Swahili adjectives change a lot depending on the noun class, but others are more fixed in form. Muhimu is commonly used unchanged.

So you can see forms like:

• barua muhimu = important letter(s)
• kitabu muhimu = important book
• watu muhimu = important people

The adjective stays muhimu.

Swahili usually does not have separate words for a, an, or the the way English does.

So sanduku can mean:

• a box
• the box

The context decides which one is meant.

That is why a sentence like Sanduku lenye barua muhimu liko mezani can be translated naturally as The box with important letters is on the table, even though there is no separate word for the.

Yes. The order in this sentence is very natural:

• Sanduku = the main noun
• lenye barua muhimu = description of that noun
• liko mezani = where it is

So the whole sentence is built as:

[noun] + [description] + [location statement]

Putting lenye barua muhimu right after sanduku makes it clear that it describes the box. That is the normal place for this kind of modifier.

Yes, that is close to the literal structure.

A more natural breakdown is:

• Sanduku = box
• lenye = having / which has
• barua muhimu = important letters
• liko = is located
• mezani = on the table

So a very literal translation would be:

The box having important letters is on the table.

But in normal English, The box with important letters is on the table sounds better.