Kawaida, watoto hukaa kimya mwalimu anapoingia darasani.

Kawaida means usually / ordinarily / as a rule. It sets the whole sentence in a habitual or general sense.

So:

• Kawaida = usually
• watoto hukaa kimya... = children are usually quiet...

You may also hear Kwa kawaida, which also means usually / generally. In many contexts, Kawaida by itself works fine.

Watoto is already the full plural noun meaning children.

Its singular is:

• mtoto = child

Its plural is:

• watoto = children

The wa- is part of the noun class pattern for plural people, so you do not add another separate word before it here.

Hukaa comes from the verb kukaa, which can mean to sit, stay, remain, live, or keep a certain state, depending on context.

In this sentence, hukaa kimya means are usually quiet / usually remain silent.

The important part is hu-. In Swahili, hu- often marks a habitual action, something that happens regularly or characteristically.

So:

• watoto hukaa kimya = children are usually quiet / children usually keep quiet
• watoto wanakaa kimya would sound more like a present/progressive statement in some contexts, depending on dialect and usage, rather than a general habitual truth

Because the sentence already means something that happens regularly, hu- is a very natural choice.

The base verb is -kaa from the infinitive kukaa.

Breakdown:

• ku- = infinitive marker
• -kaa = verb root

Then in hukaa:

• hu- = habitual marker
• -kaa = stay / sit / remain

So hukaa literally carries the idea of usually stay/remain/sit.

Kimya means silent / silence / quietly, depending on how it is being used.

In kukaa kimya, the expression means to stay quiet / remain silent. This is a very common combination in Swahili.

So:

• kaa kimya! = be quiet!
• hukaa kimya = usually remain quiet

Even though English might use an adjective like quiet, Swahili often uses this fixed expression with the verb kukaa plus kimya.

It behaves a bit differently from a simple English adjective. Kimya is often understood as silence or silent/quietness, but in expressions like kukaa kimya, it works very naturally as part of the phrase remain in silence / stay quiet.

So for a learner, the easiest way to remember it is as a set phrase:

• kukaa kimya = to stay quiet

You do not need to force it into exactly the same grammar category that English uses.

It means when the teacher enters the classroom.

Breakdown:

• mwalimu = teacher
• anapoingia = when he/she enters
• darasani = in the classroom / into the classroom

So the clause gives the time when the children are quiet.

Anapoingia can be broken down like this:

• a- = he/she
• -na- = present/ongoing marker
• -po- = when / at the time when
• -ingia = enter / go in

Together, anapoingia means when he/she enters or more literally as he/she is entering / at the time he/she enters.

This is a very common Swahili pattern for when clauses.

For example:

• ninapokuja = when I come
• wanapofika = when they arrive
• anapoingia = when he/she enters

Because the idea of when is built into the verb form through -po-.

So instead of saying a separate word plus a normal verb, Swahili often uses one combined verb form.

Compare:

• anapoingia = when he/she enters
• not necessarily a separate structure like English when + subject + verb

This is one of the important things English speakers need to get used to in Swahili: time relations are often expressed inside the verb.

In this sentence, -po- marks a time sense: when / at the time that.

So:

• anapoingia = when he/she enters

You may later see -po- in other uses too, but in this kind of relative time clause, it is very commonly translated as when.

Darasa means class / classroom.
Adding -ni often gives a location meaning: in / at / to a place.

So:

• darasa = class / classroom
• darasani = in the classroom / to the classroom / at school/class, depending on context

In this sentence, darasani means in the classroom or into the classroom, since the teacher is entering that location.

Swahili usually does not use articles like a or the the way English does. So mwalimu can mean:

• a teacher
• the teacher

The context tells you which one is meant. In this sentence, English would most naturally translate it as the teacher, because it sounds like a known classroom situation.

This order is natural in Swahili. The main clause comes first:

• watoto hukaa kimya = the children are usually quiet

Then the time clause follows:

• mwalimu anapoingia darasani = when the teacher enters the classroom

So the whole sentence is:

• Usually, the children remain quiet when the teacher enters the classroom.

You could also move parts around for emphasis, but this order is straightforward and common.

Not usually in this context. Although kukaa can literally mean to sit, here kukaa kimya is better understood as stay quiet / remain silent.

If you translated it as the children usually sit quietly when the teacher enters the classroom, that is possible in some contexts, but it is less likely to be the main intended meaning unless the context is specifically about sitting down.

Most learners should understand this phrase here as:

• keep quiet
• remain quiet
• stay silent

You may hear forms with wana- in real speech, but hukaa is especially good for expressing a habitual, general truth: something that typically happens.

So:

• watoto hukaa kimya... = children usually keep quiet...
• watoto wanakaa kimya... may sound more like a present situation or less clearly habitual, depending on usage

For this sentence, hukaa is the better form to learn.

The comma is mainly a punctuation choice in writing. It helps separate the introductory adverb Kawaida from the rest of the sentence.

So:

• Kawaida, watoto hukaa kimya...
• Kawaida watoto hukaa kimya...

Both can appear, but the comma makes the sentence easier to read in English-style punctuation.

A good way is to learn it in chunks:

• Kawaida = usually
• watoto hukaa kimya = children usually stay quiet
• mwalimu anapoingia darasani = when the teacher enters the classroom

So the useful patterns are:

• hu- + verb for habitual actions
• kukaa kimya = stay quiet
• subject + -na- + -po- + verb = when someone does something
• place + -ni = in/at a place

If you remember those chunks, this sentence becomes much easier to understand and build from.