Jana sikuwa na shampuu, kwa hiyo niliosha nywele kwa sabuni tu.

Jana means yesterday.

It often comes at the beginning of the sentence to set the time right away:

• Jana sikuwa na shampuu... = Yesterday I didn't have shampoo...

But it does not absolutely have to be first. Swahili can move time words around for emphasis, for example:

• Sikuwa na shampuu jana...

Putting jana first is just very natural.

In Swahili, to have is often expressed as kuwa na, literally to be with.

So:

• kuwa na shampuu = to have shampoo
• sikuwa na shampuu = I didn’t have shampoo

A rough breakdown is:

• si- = negative I
• -ku- = past in negative forms
• -wa = be
• na = with

So the literal idea is I was not with shampoo, which Swahili uses to mean I didn’t have shampoo.

Because Swahili does not usually use a separate verb exactly like English have. Instead, possession is commonly expressed with kuwa na = be with.

Examples:

• nina pesa = I have money
• hana gari = he/she doesn’t have a car
• tulikuwa na muda = we had time

So in your sentence, sikuwa na shampuu follows this very common pattern.

The difference is mainly time:

• sina shampuu = I don’t have shampoo / I haven’t got shampoo now
• sikuwa na shampuu = I didn’t have shampoo yesterday / at that time

So sina is present, while sikuwa na is past.

Kwa hiyo means so, therefore, or as a result.

In this sentence:

• Jana sikuwa na shampuu, kwa hiyo niliosha nywele kwa sabuni tu.
• Yesterday I didn’t have shampoo, so I washed my hair with soap only.

It connects the two ideas logically:

1. no shampoo
2. therefore, used soap

It is a very common connector in Swahili.

Niliosha means I washed.

It breaks down like this:

• ni- = I
• -li- = past tense
• -osha = wash

So:

• ni + li + osha → niliosha

This is a standard Swahili verb pattern: subject prefix + tense marker + verb root

More examples:

• nilikula = I ate
• niliona = I saw
• niliosha = I washed

Yes, in English hair is often treated as a mass noun, but in Swahili nywele is the normal word for hair and is grammatically plural in form.

So:

• nywele = hair
• unywele can mean a strand of hair or body hair/hair in a more singular or abstract sense, depending on context

In everyday speech, if you mean hair on the head, nywele is the usual word.

So niliosha nywele is the natural way to say I washed my hair.

Swahili often leaves possession understood from context, especially with body parts.

So:

• niliosha nywele naturally means I washed my hair

You can make it explicit if needed:

• niliosha nywele zangu = I washed my hair

But in many contexts, adding zangu is unnecessary because it is already obvious whose hair is meant.

Also, Swahili does not use articles like the or a the way English does, so you should not expect a separate word for the hair.

Here kwa shows the means or instrument: using soap, with soap.

So:

• kwa sabuni = with soap / using soap

In this sentence, it tells you what was used to wash the hair.

A useful way to think of it is:

• kwa + noun can often mean by means of / using

So:

• niliosha nywele kwa sabuni = I washed my hair using soap

Tu means only or just.

So:

• kwa sabuni tu = with soap only / with just soap

It adds the idea that soap was the only thing used.

In Swahili, tu often comes after the word or phrase it limits. Here it follows sabuni, so it highlights that the person used only soap.

Yes. Shampuu is a loanword based on English shampoo, but spelled in a Swahili-style way.

A few things to notice:

• Swahili spelling is usually very phonetic
• the double uu shows the long oo sound
• it is pronounced roughly like sham-puu

Many modern Swahili words for everyday items are borrowed and adapted like this.

Yes. A very literal version would be:

• Jana = Yesterday
• sikuwa na shampuu = I was not with shampoo / I didn’t have shampoo
• kwa hiyo = therefore / so
• niliosha nywele = I washed hair / I washed my hair
• kwa sabuni tu = with soap only

So the whole sentence is structurally:

Yesterday, I didn’t have shampoo, so I washed my hair with only soap.

That literal view is often helpful when learning how Swahili builds meaning.