Ni vizuri tusigombane mbele ya watoto.

Ni vizuri literally means it is good or it is nice/proper.

• ni = is / it is
• vizuri = well, nicely, properly, good

In sentences like this, ni is often used to make a general statement:

• Ni muhimu = It is important
• Ni rahisi = It is easy
• Ni vizuri = It is good / It is best

So the sentence begins with a general judgment: It is good / It is better ...

Tusigombane is a negative subjunctive form, while hatugombani is a normal negative present form.

Here is the difference:

• hatugombani = we do not fight / we are not fighting
• tusigombane = that we should not fight / let us not fight

After expressions like Ni vizuri or Ni muhimu, Swahili often uses the subjunctive because the sentence expresses advice, recommendation, or what ought to happen.

So:

• Ni vizuri tusigombane = It is good that we should not fight / It is best not to fight

This is more natural here than a plain factual statement.

It can be broken down like this:

• tu- = we
• -si- = negative marker used in this kind of subjunctive form
• gomban- = verb root from gombana, meaning quarrel / argue / fight with each other
• -e = subjunctive ending

So tusigombane means let us not quarrel or that we should not quarrel.

A useful pattern is:

• tuende = let us go
• tusiende = let us not go
• tufanye = let us do
• tusifanye = let us not do

This is because the subjunctive usually changes the final -a of the verb to -e.

So:

• dictionary form: gombana
• subjunctive form: gombane

Compare:

• kusoma → some
• kufanya → fanye
• kwenda → ende
• gombana → gombane

That is why you see tusigombane, not tusigombana.

Gombana usually means to quarrel, to argue, or to have a dispute. Depending on context, it can sometimes be translated more strongly as fight, but it often suggests verbal conflict rather than physical violence.

So in this sentence, likely meanings are:

• We shouldn’t argue in front of the children
• We shouldn’t quarrel in front of the children

If physical fighting were meant very clearly, another verb might be used depending on the situation.

Mbele ya means in front of or before.

Breakdown:

• mbele = front / ahead / before
• ya = of, agreeing with the following noun class

So:

• mbele ya watoto = in front of the children
• mbele ya nyumba = in front of the house
• mbele ya mwalimu = in front of the teacher

This is a very common structure in Swahili.

The connector changes to agree with the noun class of the following noun. Watoto belongs to the wa- plural human noun class, and the possessive/associative connector used with that class here is ya in the expression mbele ya.

In many common fixed expressions of place, you learn the whole phrase together:

• karibu na = near
• mbali na = far from
• mbele ya = in front of
• nyuma ya = behind

So it is best to learn mbele ya as a chunk meaning in front of.

Watoto means children. Its singular is mtoto, meaning child.

This is a common noun pair in the human noun class:

• mtoto = child
• watoto = children

Other examples:

• mtu = person
• watu = people

So mbele ya watoto means in front of the children.

Swahili does not usually use articles like a, an, or the.

So watoto can mean:

• children
• the children

The exact meaning depends on context.

In this sentence, English naturally says the children, but Swahili does not need a separate word for that.

It is mainly a statement that expresses advice or good judgment.

It is softer than a direct command. Compare:

• Tusigombane mbele ya watoto. = Let’s not argue in front of the children.
• Ni vizuri tusigombane mbele ya watoto. = It’s good / It’s best that we not argue in front of the children.

Adding Ni vizuri makes it sound more like a recommendation or moral comment.

Yes. That is a very natural English translation.

Depending on context, possible translations include:

• It is good that we do not argue in front of the children.
• It is better not to argue in front of the children.
• We shouldn’t argue in front of the children.
• Let’s not quarrel in front of the children.

The exact English wording depends on how directly you want to reflect the Swahili grammar versus how natural you want the English to sound.

Yes. The form itself can fit both ideas, and the surrounding context tells you which meaning is most natural.

• By itself, Tusigombane often means Let’s not argue.
• After Ni vizuri, it more naturally means that we should not argue or we shouldn’t argue.

So the grammar is the same, but the full sentence determines the best English translation.