Kifundo cha mguu wangu kina maumivu baada ya kukimbia.

Literally, kifundo cha mguu means the joint of the leg/foot.

By itself, kifundo is more general than ankle. It can refer to a joint, knuckle, or even a knot, depending on context. Adding cha mguu specifies which joint it is, so the whole phrase means ankle.

Because the connector -a changes form to agree with the noun before it.

Here, the first noun is kifundo, which is in noun class 7. For class 7 singular nouns, the connector becomes cha.

So:

• kifundo + a + mguu → kifundo cha mguu

If the first noun were in a different class, the connector would change:

• kitabu cha mwanafunzi = the student's book
• vitabu vya mwanafunzi = the student's books

So cha is there because it agrees with kifundo.

In Swahili, possessives normally come after the noun they describe.

So:

• mguu wangu = my leg/foot
• kitabu changu = my book
• rafiki yangu = my friend

That is why you get mguu wangu, not wangu mguu.

Because ankle is being expressed as the phrase kifundo cha mguu. Once that phrase is built, possession is naturally added inside it as mguu wangu.

So:

• kifundo cha mguu wangu = literally the ankle of my leg/foot
• natural English meaning: my ankle

This is the normal, idiomatic way to say it.

Kina agrees with kifundo, the subject of the sentence.

Breakdown:

• ki- = subject marker for noun class 7 singular
• -na- = present tense / general present

So kina here means something like it has.

Since kifundo is class 7 singular, you use ki-:

• kifundo ... kina ... = the ankle ... has ...

If the subject changed, the agreement would change too:

• mkono una... = the arm has...
• jicho lina... = the eye has...
• vifundo vina... = the joints/ankles have...

Literally, kina maumivu means has pains or has pain.

So the whole sentence is built in a very Swahili-like way:

• Kifundo cha mguu wangu kina maumivu
  = My ankle has pain = natural English: My ankle hurts

Swahili often uses have pain where English prefers hurt.

Yes. That would also be natural.

• Kifundo cha mguu wangu kinauma baada ya kukimbia. = My ankle hurts after running.

The difference is roughly:

• kinauma = it hurts / it is painful
• kina maumivu = it has pain / it is in pain

Both are fine. Kinauma is often a bit more direct and common in everyday speech.

In Swahili, maumivu is the normal word for pain, even though it looks plural to an English speaker.

This is just how the noun is commonly used. Swahili often treats certain experiences or conditions with nouns that belong to the ma- class.

So you should learn:

• maumivu = pain
• ana maumivu = he/she is in pain
• nina maumivu ya kichwa = I have a headache / I have head pain

Even if English uses singular pain, Swahili very often uses maumivu.

Word for word:

• baada = after
• ya = of
• kukimbia = to run / running

So literally it is something like after of running, but natural English is:

• after running
• sometimes after I ran, depending on context

Baada ya is a very common fixed expression meaning after.

Because the Swahili infinitive in ku- often works like both:

• an infinitive: to run
• a verbal noun / gerund: running

So:

• kukimbia ni vizuri = to run is good / running is good
• baada ya kukimbia = after running

This is very normal in Swahili grammar.

It can mean leg and in some contexts can also refer broadly to the lower limb area, so context matters.

In the phrase kifundo cha mguu, the meaning is clearly ankle, so learners usually do not need to worry too much about whether to think of mguu as leg or foot there. The full phrase is what matters.

Yes. Swahili word order is flexible enough for that.

You can say:

• Kifundo cha mguu wangu kina maumivu baada ya kukimbia.
• Baada ya kukimbia, kifundo cha mguu wangu kina maumivu.

Both are correct. The second version just emphasizes the time phrase a bit more.

You would change the noun-class agreements:

• kifundo → vifundo
• cha → vya
• mguu → miguu
• kina → vina

So the sentence becomes:

Vifundo vya miguu yangu vina maumivu baada ya kukimbia.

That means My ankles hurt after running.