Ninahitaji usingizi wa kutosha kila usiku.

Ninahitaji can be divided like this:

• ni- = I
• -na- = present tense marker
• -hitaji = need

So ninahitaji means I need.

In everyday speech, the present tense in Swahili often covers meanings that English expresses as simple present, so here it is best understood as I need, not necessarily I am needing.

No. The ni- at the start of ninahitaji already tells you the subject is I.

So:

• Ninahitaji usingizi wa kutosha kila usiku. = I need enough sleep every night.

You could add mimi for emphasis:

• Mimi ninahitaji usingizi wa kutosha kila usiku.

That would sound more like I need enough sleep every night with extra stress on I.

Usingizi is a noun meaning sleep.

That makes it a good match for the English noun in enough sleep.

• usingizi = sleep
• kulala = to sleep / sleeping

So this sentence is built around the noun sleep, not the verb to sleep.

A learner should notice this difference:

• Ninahitaji usingizi... = I need sleep...
• Ninahitaji kulala... = I need to sleep...

Both can be correct, but they mean slightly different things.

Wa kutosha means enough or sufficient in this sentence.

Literally, it is a structure attached to the noun:

• usingizi wa kutosha = sleep that is enough / sufficient sleep

So instead of placing a single adjective before the noun the way English does, Swahili often uses a connector plus another word or phrase after the noun.

That is why enough sleep becomes:

• usingizi wa kutosha

not a one-word adjective directly equivalent to English enough before the noun.

The wa is a linking word that agrees with the noun usingizi.

In Swahili, this kind of connector changes depending on the noun class of the noun before it. So you do not always use the same form. Here, the correct form after usingizi is wa.

Compare the general pattern:

• noun + agreeing linker + descriptive phrase

So:

• usingizi wa kutosha = enough sleep
• literally: sleep of being enough / sleep that is sufficient

For a learner, the important point is that wa is not chosen randomly; it is there because Swahili grammar requires agreement with usingizi.

Kutosha comes from the verb -tosha, which means to be enough or to be sufficient.

The ku- form is the infinitive, so:

• kutosha = to be enough

In the phrase wa kutosha, this infinitive is used in a descriptive way, giving the meaning sufficient or enough.

So:

• usingizi wa kutosha = sleep that is enough
• natural English: enough sleep

Kila usiku means every night.

• kila = every / each
• usiku = night / at night

Together they mean every night.

This is a very common time expression in Swahili, and time phrases often come at the end of the sentence:

• Ninahitaji usingizi wa kutosha kila usiku.
• I need enough sleep every night.

Yes, the word order is natural and straightforward:

• Ninahitaji = I need
• usingizi wa kutosha = enough sleep
• kila usiku = every night

So the full order is:

subject + verb + object phrase + time expression

That is a very normal Swahili sentence pattern.

You may sometimes move time expressions for emphasis, but for a learner, this sentence order is the safest and most natural one to use.

Yes. Nahitaji is very common and natural in everyday Swahili.

So both of these are used:

• Ninahitaji usingizi wa kutosha kila usiku.
• Nahitaji usingizi wa kutosha kila usiku.

The longer form ninahitaji clearly shows the internal structure ni- + -na- + hitaji, while nahitaji is a common contracted form in actual usage.

For a learner, it is useful to recognize both.

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

So usingizi can mean sleep, the sleep, or some sleep, depending on context. In this sentence, the meaning is simply sleep in a general sense:

• Ninahitaji usingizi wa kutosha kila usiku.
• I need enough sleep every night.

This is normal in Swahili, so you do not need to look for a separate word corresponding to English articles.