Saya pamit ke Ibu dulu, lalu berangkat ke perpustakaan dengan adik perempuan saya.

Pamit means to take leave from someone before you go. It focuses on the social act of saying goodbye or asking permission to leave.

By contrast:

• pergi = to go
• berangkat = to depart, set off
• pamit = to say goodbye / excuse yourself before leaving

So in this sentence, Saya pamit ke Ibu dulu is not just I go to Mother. It means I say goodbye to Mother first or I excuse myself to Mother first.

In everyday Indonesian, pamit ke + person is a common and natural pattern. It means you are taking leave to/from that person.

So:

• pamit ke Ibu = say goodbye to Mother / excuse oneself to Mother

You may also hear:

• pamit kepada Ibu

This is a bit more formal. In casual speech, ke is very common and sounds natural.

Ibu can mean different things depending on context:

• mother / mom
• Mrs.
• ma’am

When it is capitalized as Ibu, it often functions like a title or a respectful form of address. In this sentence, it most likely refers to the speaker’s mother, especially because there is no name after it and the context is personal.

If it were lowercase ibu, it could also just mean mother as a common noun.

So capitalization helps show respect and can make it feel like a direct family title, similar to writing Mom in English.

Here dulu means first.

So:

• Saya pamit ke Ibu dulu = I’ll say goodbye to Mother first

It does not mean the past here. In other contexts, dulu can mean formerly or in the past, but in this sentence it clearly marks the first action in a sequence.

This is very common in Indonesian:

• Makan dulu = eat first
• Istirahat dulu = rest first
• Saya pulang dulu = I’m heading home first / I’ll go home now

Lalu means then or after that. It links one action to the next in sequence.

In this sentence:

• first: Saya pamit ke Ibu dulu
• next: lalu berangkat ke perpustakaan

So lalu helps show the order of events.

Other possible connectors include:

• kemudian = then, afterwards, a bit more formal
• terus = then, and then, more conversational
• setelah itu = after that

Lalu is neutral and very common in both speech and writing.

Both can be translated as go, but they are not exactly the same.

• pergi = go
• berangkat = depart, set off, leave for a destination

Berangkat emphasizes the start of the trip or departure. It often sounds a bit more purposeful.

Examples:

• Saya pergi ke toko = I go to the store
• Saya berangkat ke kantor jam 7 = I leave for the office at 7

So berangkat ke perpustakaan means the speaker set off for the library, not just that they generally went there.

Because this is a different ke with a different function.

There are two ke phrases in the sentence:

• pamit ke Ibu → directed toward a person in the expression pamit ke
• berangkat ke perpustakaan → motion toward a place

In the second one, ke is the normal preposition meaning to for destinations:

• ke sekolah = to school
• ke rumah = to home/the house
• ke perpustakaan = to the library

So even though the same word appears twice, the roles are slightly different because the verbs are different.

Indonesian does not use articles like a, an, or the the way English does.

So:

• ke perpustakaan can mean to the library
• depending on context, it could also be understood more generally as to a library, but in a sentence like this English usually translates it as the library

Indonesian relies much more on context than English for this kind of information.

Adik perempuan saya specifically means my younger sister.

Breakdown:

• adik = younger sibling
• perempuan = female
• saya = my / I

So the phrase literally means my female younger sibling.

By contrast:

• saudara perempuan saya = my sister / female sibling

But saudara perempuan is less specific about age and can sound more formal or less natural in everyday family talk. Indonesian often distinguishes older and younger siblings:

• kakak perempuan = older sister
• adik perempuan = younger sister

This is a very important difference from English, where sister does not tell you whether she is older or younger.

In Indonesian, possessives usually come after the noun.

So:

• adik perempuan saya = my younger sister
• literally: younger sister female my

This is normal Indonesian word order.

More examples:

• rumah saya = my house
• buku saya = my book
• ibu saya = my mother

So the pattern is:

noun + possessor

not

my + noun

Here dengan means with, showing accompaniment:

• berangkat ke perpustakaan dengan adik perempuan saya = leave for the library with my younger sister

Yes, bersama could also be used:

• berangkat ke perpustakaan bersama adik perempuan saya

That often sounds slightly clearer or a little more explicitly like together with. In many cases, dengan and bersama are both possible, though dengan can also have other meanings such as by means of or using, depending on context.

In this sentence, the meaning is clearly companionship, so dengan works fine.

Yes, it is natural and understandable. A native speaker would have no problem with it.

Some alternative versions are also common, for example:

• Saya pamit dulu ke Ibu, lalu berangkat ke perpustakaan dengan adik perempuan saya.
• Saya pamit kepada Ibu dulu, lalu berangkat ke perpustakaan bersama adik perempuan saya.

These differences are about style, emphasis, or level of formality:

• moving dulu earlier can sound slightly more natural to some speakers
• kepada is more formal than ke
• bersama is a slightly more explicit together with

But the original sentence is perfectly good Indonesian.