Mbwa alitikisa mkia wake kwa furaha tulipofika nyumbani.

Swahili does not have articles like the or a/an.

So mbwa can mean:

• a dog
• the dog
• sometimes just dog/dogs depending on context

In this sentence, the context tells us it means the dog.

This is a very common question.

In Swahili, animals often take the same agreement pattern as people, especially when they are being treated as living beings rather than as objects. So mbwa can take class 1/2 agreement:

• a- = he/she/it in the singular for animate nouns
• wa- = they for animate plurals

So:

• Mbwa alitikisa... = The dog wagged...

Even though English uses it for an animal, Swahili often uses the animate agreement pattern.

Alitikisa can be broken down like this:

• a- = subject marker, he/she/it
• -li- = past tense
• -tikisa = shake

So alitikisa means:

• he/she/it shook
• in this sentence, more naturally: it wagged/shook

Since the verb -tikisa means to shake, the idea of wagging comes from the context of the tail.

Swahili often expresses this idea with the general verb -tikisa, meaning to shake.

So alitikisa mkia wake is literally something like:

• it shook its tail

But in natural English, when a dog shakes its tail, we usually say:

• it wagged its tail

So the translation uses the more natural English verb.

In Swahili, possessives usually come after the noun.

So:

• mkia = tail
• wake = his/her/its

Together:

• mkia wake = his/her/its tail

This word order is normal in Swahili:

• kitabu changu = my book
• nyumba yao = their house
• mkia wake = its tail

The possessive form changes to match the noun class of the thing being possessed.

Here, mbwa is being treated with animate agreement, so the possessive form is wake:

• -angu = my
• -ako = your
• -ake = his/her/its

With the class 1 agreement prefix, -ake becomes wake.

So:

• wake = his/her/its

In this sentence, it refers to the dog, so in English we translate it as its.

Literally, kwa furaha means:

• with happiness
• with joy

But in English we often translate it more naturally as:

• happily
• joyfully

Swahili often uses kwa + noun to express an adverb-like meaning.

Examples:

• kwa haraka = quickly
  literally with speed
• kwa makini = carefully
• kwa furaha = happily / with joy

So kwa furaha explains how the dog wagged its tail.

Tulipofika is a very useful Swahili form. It means:

• when we arrived

It can be broken down like this:

• tu- = we
• -li- = past
• -po- = relative marker of time, often giving the sense when
• -fika = arrive

So:

• tulipofika = when we arrived

Swahili often packs subject, tense, and relative meaning into a single verb form, which is why it appears as one word.

The -po- here marks a time relationship and is often translated as when.

So:

• tulifika = we arrived
• tulipofika = when we arrived

This is a very common structure in Swahili for clauses involving time.

Other similar examples:

• ulipoenda = when you went
• walipokuja = when they came
• nilipoona = when I saw

So in this sentence, tulipofika nyumbani means when we arrived home.

The ending -ni often indicates location.

• nyumba = house
• nyumbani = at home / in the house / to home, depending on context

In this sentence, nyumbani is best understood as home in a locational sense:

• tulipofika nyumbani = when we arrived home

This -ni ending is very common with place words in Swahili.

Examples:

• shuleni = at school
• sokoni = at the market
• nyumbani = at home / home

Because Swahili often builds that meaning directly into the verb.

Instead of using a separate word equivalent to English when, Swahili can use the relative marker -po- inside the verb:

• tulipofika = when we arrived

So the idea of when is grammatical, not a separate vocabulary word here.

The basic order is still quite close to English:

• Mbwa = the dog
• alitikisa = wagged
• mkia wake = its tail
• kwa furaha = happily
• tulipofika nyumbani = when we arrived home

So the sentence is basically:

• The dog wagged its tail happily when we arrived home.

Swahili is fairly flexible with word order, but this order is natural and straightforward.

Yes. Swahili often allows that.

You could say:

• Tulipofika nyumbani, mbwa alitikisa mkia wake kwa furaha.

This means the same thing:

• When we arrived home, the dog wagged its tail happily.

Putting the time clause first just changes the emphasis slightly, not the basic meaning.

By itself, alitikisa is simply a past action: shook.

But because the object is mkia wake (its tail), the natural interpretation is wagged its tail, which usually implies repeated movement.

So the repeated sense comes mostly from real-world meaning and from English translation, not from a special verb ending here.

Yes, that is very close to the literal Swahili structure.

A more literal version would be:

• The dog shook its tail with happiness when we arrived home.

But more natural English is:

• The dog wagged its tail happily when we arrived home.

So both are understandable, but the second sounds more natural in English.

Context and sentence structure make this clear.

In mkia wake, the possessive wake is attached to mkia and refers to the owner of the tail. The most logical owner is mbwa (the dog), not we.

Then later, tulipofika clearly introduces a different subject:

• tu- = we

So the sentence has:

• the dog as the subject of alitikisa
• we as the subject of tulipofika

That is completely normal in Swahili.