Baba hutumia wembe kunyoa ndevu zake asubuhi.

In this sentence, hu- marks the habitual: something that happens regularly or as a routine.

So Baba hutumia... asubuhi suggests:

• Father/Dad usually uses... in the morning
• or Father uses... every morning

This is different from Baba anatumia, which would normally mean Father is using or Father uses in a more ordinary present-time sense.

A useful thing to notice is that with this habitual form, the verb often does not show a separate person marker inside the verb. The subject is already clear from Baba.

The best match is usually uses.

English often uses the simple present for habits, as in He uses a razor in the morning, but Swahili makes the habitual idea more explicit here with hu-.

So this sentence is not mainly about what is happening right now. It describes a regular action or routine.

Kunyoa is the infinitive, meaning to shave.

Here it expresses purpose:

• hutumia wembe = uses a razor
• kunyoa ndevu zake = to shave his beard

So the structure is basically:

• uses a razor to shave his beard

The ku- at the beginning is the normal infinitive marker, similar to English to in to shave.

Because Swahili builds that meaning into the verb form itself.

In kunyoa:

• ku- = infinitive marker
• -nyoa = shave

So kunyoa already means to shave. Swahili does not need a separate extra word corresponding to English to here.

Because with kutumia (to use), the thing being used is normally the direct object.

So:

• hutumia wembe = uses a razor

That is very similar to English, where we also say use a razor, not use with a razor.

You could express instrument in other ways in other sentence patterns, but with tumia, a direct object is the natural choice.

Because the possessive in Swahili agrees with the thing possessed, not with the owner.

Here, the possessed noun is ndevu. That noun takes class 10 agreement, so the possessive uses za-:

• za-
  • -ake = zake

So:

• ndevu zake = his beard / her beard, depending on context

English speakers often expect the possessive to match the person, but in Swahili it matches the noun class of the possessed noun.

It can mean his or her. Swahili does not normally mark gender in this kind of possessive.

So zake by itself does not tell you whether the owner is male or female. In this sentence, we understand it as his because the subject is Baba.

Because Swahili noun classes do not match English singular/plural patterns exactly.

Ndevu is treated as a noun that takes class 10 agreement, so it goes with forms like zake. Even though English uses the singular word beard, Swahili uses ndevu and the grammar follows its noun class.

A good way to think about it is:

• do not force English number patterns onto Swahili nouns
• learn each noun together with the agreement it requires

So the important pattern to remember is:

• ndevu zangu = my beard
• ndevu zake = his/her beard

Because Swahili does not have articles that work like English a/an and the.

So nouns often appear by themselves:

• wembe can mean a razor or the razor
• ndevu zake can mean his beard

Context tells you whether something is indefinite or definite.

That is why the sentence can be translated naturally into English with articles, even though none appear in the Swahili.

Putting time expressions at the end is very common in Swahili.

So this order is perfectly natural:

• Baba hutumia wembe kunyoa ndevu zake asubuhi

It keeps the sentence in a straightforward pattern:

• subject
• verb
• object
• purpose phrase
• time expression

You can move asubuhi for emphasis, for example:

• Asubuhi, Baba hutumia wembe kunyoa ndevu zake.

But the version with asubuhi at the end is a neutral, natural word order.

Because the verb is habitual (hutumia), the sentence is most naturally understood as a routine:

• in the morning
• in the mornings
• every morning

If the verb were not habitual, asubuhi could more easily refer to a specific morning depending on context. But with hutumia, the idea is clearly a repeated action.