Tunapopumua karibu na bahari, tunahisi upepo mwanana.

Tunapopumua breaks down like this:

• tu- = subject marker for “we”
• -na- = present tense marker (“are / do (present)”)
• -po- = “when / whenever” (a relative/temporal marker)
• pumua = verb root “to breathe”

So tunapopumua literally means something like “when we are breathing” or “whenever we breathe.”

• Tunapumua karibu na bahari = “We breathe / are breathing near the sea.”
  This is a normal main clause in the present tense.

• Tunapopumua karibu na bahari = “When(ever) we breathe near the sea…”
  Here -po- turns the verb into a time clause, so the first part of the sentence depends on the second:
  “When(ever) we breathe near the sea, we feel a gentle breeze.”

So -po- signals that this action provides the time context for what comes next, rather than just another independent statement.

Yes, you can say:

• Tukipumua karibu na bahari, tunahisi upepo mwanana.

This is also correct and natural. Roughly:

• Tunapopumua… (with -po-) = “when(ever) we breathe…” (often felt as a bit more definite or neutral)
• Tukipumua… (with -ki-) = “when / whenever / if we breathe…” (often felt as a bit more “while/as we are” or “if/whenever”)

In many everyday contexts the difference is small, and both versions would be understood as “When we breathe near the sea, we feel a gentle breeze.”

• karibu = “near, close, nearby”
• na = a very flexible word: “and, with, to”, and in this structure it helps form “near to”
• bahari = “sea”

So karibu na bahari is literally “near to the sea.”

In this kind of phrase, Swahili normally says karibu na + [place]:

• karibu na shule = near the school
• karibu na mto = near the river

Saying karibu bahari without na would sound odd or incomplete in standard Swahili.

You can move it, but the focus shifts slightly depending on where it goes:

1. Tunapopumua karibu na bahari, tunahisi upepo mwanana.
   – Emphasis: our breathing is happening near the sea.

2. Tunapopumua, tunahisi upepo mwanana karibu na bahari.
   – Emphasis: the gentle breeze is felt near the sea (it may sound more like the location of the breeze, not of the breathing).

Both are grammatically possible. The original version most clearly links the location to the act of breathing, which matches the intended meaning.

The -na- marker indicates present tense (often both present continuous and simple present in English terms):

• tunapumua = we breathe / we are breathing
• tunapopumua = when we are breathing
• tunahisi = we feel / we are feeling

Swahili doesn’t split present time into “simple” vs. “continuous” as strictly as English does. -na- just says the action is happening now or is habitual, and context tells you which nuance fits best.

In Swahili, the subject is usually built into the verb:

• tu- at the start of tunapopumua and tunahisi means “we.”

So:

• tunapopumua = tu- (“we”) + -na- (present) + pumua (breathe)
• tunahisi = tu- (“we”) + -na- (present) + hisi (feel)

You can add sisi for emphasis:

• Sisi tunapopumua karibu na bahari…
  = “We (as opposed to others), when we breathe near the sea…”

but normally the tu- is enough.

In Swahili, adjectives normally come after the noun they describe:

• upepo mwanana = gentle wind
• mtu mzuri = good person
• chakula kitamu = tasty food

So:

• upepo = wind/breeze
• mwanana = gentle, soft, mild

Putting mwanana before upepo (mwanana upepo) would sound wrong in standard Swahili; it would be like saying “gentle wind” as “gentle the wind” with the wrong order.

Mwanana means “gentle, mild, soft, pleasant” and often has a slightly poetic or descriptive feel. It’s commonly used with:

• upepo mwanana = a gentle / mild breeze
• sauti mwanana = a soft, gentle voice

Compared with a few similar words:

• laini = soft/smooth (texture) – e.g. blanketi laini (a soft blanket)
• mpole = gentle, kind (mainly about a person’s character)
• pole (adverb) = gently, slowly

So using mwanana here adds a sense of a pleasant, gentle quality, very natural with upepo (wind/breeze).

Swahili does not have separate words for “a/an” or “the.” Nouns are bare and context provides the meaning:

• upepo mwanana can mean:
  • “a gentle breeze”
  • “the gentle breeze”
  • sometimes even “gentle breeze” in general

If you need to be more specific, you use other tools, like demonstratives:

• upepo mwanana huu = this gentle breeze
• ule upepo mwanana = that gentle breeze

But ordinary sentences usually just rely on context instead of articles.