Filamu inatuburudisha.

Because Swahili verbs often pack several pieces of meaning into a single verb form.

Here, inatuburudisha can be broken down as:

• i- = subject marker for filamu
• -na- = present tense
• -tu- = us
• burudish = entertain / amuse
• -a = final vowel of the affirmative verb

So the whole verb literally works like:

i-na-tu-burudish-a
= it-is-us-entertaining
= it entertains us

Ina- is made of two parts:

• i- = the subject marker that agrees with filamu
• -na- = the present tense marker

So ina- means something like it is / it does in the present.

In this sentence, filamu is the subject, so the verb must agree with it.

It is the part -tu- inside the verb.

So:

• tu = us

That means Swahili does not need a separate standalone word here for us the way English does. Instead, the object is built into the verb:

inatuburudisha = it entertains us

This is very normal in Swahili.

Burudisha means entertain, amuse, or give enjoyment to.

It is a causative-type verb: it has the sense of make someone enjoy themselves or cause pleasure.

So:

• Filamu inatuburudisha = the film is entertaining us / the film entertains us

You may also notice related words such as:

• burudani = entertainment
• kuburudika = to be entertained / to enjoy oneself
• kuburudisha = to entertain someone

Because Swahili verbs must agree with the noun class of the subject.

Filamu belongs to the N class group, and in the singular it commonly takes the subject marker i-.

So:

• filamu ina-... = the film ...
• not filamu ana-...

A- is usually used for a singular human subject, such as mtoto or mwalimu in many contexts.

Often the noun itself stays the same:

• filamu = film / films

But the agreement on the verb changes.

Compare:

• Filamu inatuburudisha. = The film entertains us.
• Filamu zinatuburudisha. = The films entertain us.

So the noun may look the same in singular and plural, but the verb tells you whether it is singular or plural:

• i- = singular
• zi- = plural

Because the idea of it is already included in the verb through the subject marker i-.

Swahili often does this:

• the subject agreement is built into the verb
• the object can also be built into the verb

So even without filamu, inatuburudisha already contains the idea it entertains us.

The noun filamu is still used to make clear what it refers to.

A simple breakdown is:

• fi-LA-mu
• i-na-tu-bu-ru-DI-sha

Swahili usually stresses the second-to-last syllable of each word.

So the natural stress is:

• fi-LA-mu
• i-na-tu-bu-ru-DI-sha

Also, Swahili spelling is very regular, so you usually pronounce what you see.

You would say:

Filamu haituburudishi.

Here is what changes:

• i-na- becomes hai- in the negative
• the final -a changes to -i

So:

• inatuburudisha = it entertains us
• haituburudishi = it does not entertain us

Yes, but the meaning changes.

• Filamu inatuburudisha = The film entertains us
• Filamu inaburudisha = The film is entertaining / The film entertains

Without -tu-, you are no longer saying who is being entertained. The sentence becomes more general.

So -tu- is important if you specifically want to say us.