Setelah dipotong, melon itu dimasukkan ke wadah makan untuk besok.

Setelah means after. The phrase setelah dipotong means after being cut or once it had been cut.

Indonesian often begins a sentence with a time phrase like this to set the scene first:

• Setelah dipotong, ... = After being cut, ...

This is very natural. English can do the same:

• After being cut, the melon was put into a food container for tomorrow.

So the sentence starts by telling you when the main action happened.

Dipotong is a passive form. It means is cut / was cut / being cut, depending on context.

• memotong = to cut / cutting (active voice)
• dipotong = to be cut / cut (passive voice)

So:

• setelah dipotong = after being cut
• setelah memotong would mean after cutting, which would imply a subject like after (someone) cut...

In this sentence, Indonesian focuses on the melon and what happened to it, not on who did it.

The sentence does not say. This is very common in Indonesian.

Both dipotong and dimasukkan are passive forms, so the focus is on the melon, not the person doing the actions.

So the meaning is roughly:

• After being cut, the melon was put into a food container for tomorrow.

If the speaker wanted to mention the doer, they could, but it is often unnecessary when the context already makes it clear.

Because di- here is a prefix, not a separate preposition.

• dimasukkan = passive verb = to be put/inserted
• di as a separate word is a preposition meaning in / at / on

Compare:

• dimasukkan = was put in
• di wadah = in the container

A useful rule:

• If di is part of a verb, write it together: dimasukkan, dipotong, dibuka
• If di shows a location, write it separately: di rumah, di meja, di wadah

Itu after a noun usually means that or the, depending on context.

So:

• melon itu = that melon or the melon

In Indonesian, demonstratives usually come after the noun:

• rumah itu = that house
• buku itu = that book
• melon itu = that/the melon

This is different from English, where that comes before the noun.

Ke usually indicates movement toward a place: to / into.

So:

• dimasukkan ke wadah makan = put into a food container

The verb dimasukkan already implies movement into something, so ke is natural here.

Compare:

• ke wadah = into/to the container → movement
• di wadah = in the container → location

Examples:

• Buah itu dimasukkan ke kulkas. = The fruit was put into the fridge.
• Buah itu ada di kulkas. = The fruit is in the fridge.

Wadah makan literally means food container or container for food.

It is understandable, but depending on context, native speakers might also say:

• kotak makan = lunch box / food box
• wadah makanan = food container
• tempat makan = eating container / lunch container, depending on context

So wadah makan is understandable, but wadah makanan or kotak makan may sound more natural in some situations.

Untuk besok means for tomorrow.

In this sentence, it most naturally means that the melon was put into the container to be used/eaten tomorrow.

So the idea is:

• After being cut, the melon was put into a food container for tomorrow.

This does not usually mean tomorrow the melon will be put into the container. The container action is happening now; untuk besok gives the purpose or future use.

Yes, it is understandable, but it can be a little broad. It means for tomorrow, but it does not specify exactly for tomorrow’s meal, for tomorrow morning, etc.

Depending on the intended meaning, a speaker could say:

• ... untuk dimakan besok. = ... to be eaten tomorrow
• ... buat besok. = ... for tomorrow (more informal)
• ... untuk bekal besok. = ... for tomorrow’s packed meal/lunch

So the original sentence is fine, but context helps.

Yes, there is no explicit subject in that opening phrase, and yes, that is normal.

Indonesian often leaves out subjects when they are obvious from context. Here:

• Setelah dipotong = after being cut

The thing being cut is understood to be the melon, which appears in the main clause.

This kind of compressed structure is very common and natural in Indonesian.

Yes. An active version would mention the doer more directly. For example:

• Setelah memotong melon itu, saya memasukkannya ke wadah makan untuk besok. = After cutting the melon, I put it into a food container for tomorrow.

Here:

• memotong = active
• memasukkan = active
• saya = I
• -nya in memasukkannya = it

The original passive sentence is more neutral and focuses on the melon rather than the person.

The base is masuk, which means enter / go in.

From that, Indonesian forms memasukkan or dimasukkan, which mean to put something into or to insert.

So the pattern is roughly:

• masuk = to enter
• memasukkan = to put something in
• dimasukkan = to be put in

This is a very common verb pattern in Indonesian.

Yes, somewhat. Indonesian word order is fairly flexible, especially with time phrases.

For example:

• Melon itu dimasukkan ke wadah makan untuk besok setelah dipotong.
• Setelah dipotong, melon itu dimasukkan ke wadah makan untuk besok.

Both are understandable, but the original version sounds natural because it presents the sequence clearly:

1. after being cut
2. the melon was put into the container

Starting with setelah dipotong makes the timeline especially clear.