Nikipiga chafya darasani, huwa nafunika mdomo wangu kwa kitambaa.

It is made from ni- + -ki-.

• ni- = I
• -ki- = a marker often meaning if, when, or whenever

So nikipiga means if/when I do. In this sentence, it introduces the situation when I sneeze.

It can mean either, depending on context.

In many sentences, -ki- can be translated as if. But when the sentence is about a repeated or usual situation, it often means when or whenever.

Because this sentence also uses huwa, which shows habit, nikipiga chafya is best understood as when I sneeze or whenever I sneeze.

This is a very common Swahili pattern. Swahili often uses a light verb + noun expression where English uses a single verb.

Here:

• kupiga literally often means to hit / strike
• chafya = a sneeze

But together, kupiga chafya means to sneeze.

This same pattern appears in other common expressions too:

• kupiga simu = to make a phone call
• kupiga picha = to take a picture
• kupiga kelele = to make noise

So kupiga chafya should be learned as a set expression.

Huwa shows that something happens habitually, usually, or as a general practice.

So:

• nafunika can mean I cover / I am covering
• huwa nafunika means I usually cover or I tend to cover

In this sentence, huwa tells you this is not a one-time action. It is something the speaker normally does.

After verbs like huwa, Swahili often drops the repeated subject marker in the next verb.

So:

• huwa ninafunika
• huwa nafunika

Both can be understood, but the shorter form huwa nafunika is very common and natural.

This also happens with forms of kuwa in other tenses:

• nilikuwa nakula = I was eating
• nitakuwa nasoma = I will be studying

So huwa nafunika is a normal pattern.

Yes, that is possible.

The hu- form also expresses habitual action:

• Mimi hufunika mdomo wangu... = I usually cover my mouth...

But huwa + present-form verb is very common in everyday speech and often feels more conversational.

So both are valid, but huwa nafunika is a very natural choice.

Darasa means class or classroom. The ending -ni is a locative ending, which often means in, at, or to a place.

So:

• darasa = class / classroom
• darasani = in class / in the classroom

This is a very common pattern in Swahili:

• nyumbani = at home
• shuleni = at school
• mezani = on the table / at the table

So darasani is the location word here.

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

Here, mdomo belongs to a noun class that takes the possessive form wangu for my.

So:

• mdomo wangu = my mouth

You cannot just use one form of my for every noun. It changes with noun class:

• kitabu changu = my book
• nyumba yangu = my house
• mdomo wangu = my mouth

That is why wangu is correct here.

Here kwa means with, by means of, or using. It marks the instrument or means used to do something.

So:

• kwa kitambaa = with a cloth / using a cloth

In other contexts, kwa can have other meanings too, such as at, to, from, or by, but here it clearly shows the thing used to cover the mouth.

Not exactly. Kitambaa is a general word meaning cloth, piece of cloth, or sometimes something like a handkerchief, depending on context.

So in this sentence, it suggests covering the mouth with a cloth or with a handkerchief-like cloth.

If you specifically want tissue, many speakers today use the loanword tishu.

Yes, but it is usually not necessary.

You could say:

Mimi nikipiga chafya darasani, huwa nafunika mdomo wangu kwa kitambaa.

That is grammatical, but mimi adds emphasis, something like as for me or I personally.

Normally, Swahili does not need the separate subject pronoun here because the verb already shows the subject.

Yes, Swahili allows some flexibility, but the original order is very natural.

The sentence starts with the condition or situation:

Nikipiga chafya darasani, ...

and then gives the usual action:

... huwa nafunika mdomo wangu kwa kitambaa.

That structure is clear and common. You could rearrange parts for style or emphasis, but the original version is a good model for learners because it is straightforward and natural.