Dia menyimpan benang dan jarum kalau-kalau lengan baju itu perlu dipanjangkan.

Dia is a third-person singular pronoun meaning he, she, or sometimes they for one person in very general explanation. Malay usually does not mark gender in pronouns the way English does, so you need context to know whether the person is male or female.

Malay verbs do not change form for tense the way English verbs do. So menyimpan by itself can refer to present, past, or future depending on context.

So this sentence could be understood in English as something like:

• He/She keeps thread and a needle...
• He/She kept thread and a needle...
• He/She is keeping thread and a needle...

The surrounding context tells you which English tense is most natural.

Simpan is the basic root, meaning keep, store, or save.

Menyimpan is the active verb form built from that root. The prefix meN- marks an active verb, so dia menyimpan means he/she keeps/stores.

Very roughly:

• simpan = the root / dictionary form
• menyimpan = to keep, to store

This is extremely common in Malay: a root gets a prefix to become a normal verb in a sentence.

It can mean any of those depending on context. In this sentence, menyimpan most naturally means keeps or has put aside/stored.

So the idea is that the person has thread and a needle available for possible later use.

Yes.

• benang = thread
• dan = and
• jarum = needle

So benang dan jarum means thread and needle.

English often says needle and thread, but Malay can say benang dan jarum. Word order in lists does not always match the most common English order.

Because kalau-kalau is a fixed expression meaning in case or just in case.

Compare:

• kalau = if
• kalau-kalau = in case / just in case

So here it does not mean a simple condition like if. It gives the idea of preparing for a possible situation.

Literally, it is something like the arm of a shirt, but in normal English we say sleeve.

Breakdown:

• lengan = arm
• baju = shirt / clothing / garment

When Malay combines nouns like this, the first noun is often understood in relation to the second. So lengan baju means shirt sleeve or simply sleeve.

In Malay, demonstratives like ini (this) and itu (that) usually come after the noun, not before it.

So:

• baju itu = that shirt
• lengan baju itu = the sleeve of that shirt / that shirt’s sleeve

This is a very common Malay pattern.

In this sentence, the most natural reading is the sleeve of that shirt.

That is because itu comes after the whole noun phrase:

• lengan baju itu

This usually points to the whole expression, so it is understood as the sleeve of that shirt rather than just that sleeve in a general sense.

Perlu means need to, needs to, or it is necessary to.

So:

• perlu dipanjangkan = needs to be lengthened

A useful point: Malay does not need a separate word like English to after need. You can just put the next verb after perlu.

Dipanjangkan is built from panjang, which means long.

Here is the structure:

• panjang = long
• -kan = makes something become / causes something to be
• di- = passive marker

So dipanjangkan means to be lengthened, to be made longer, or to be extended.

Because dipanjangkan is passive, while memanjangkan is active.

• memanjangkan = to lengthen something
• dipanjangkan = to be lengthened

In this sentence, the focus is on the sleeve, not on the person doing the sewing. English does the same thing often:

• the sleeve needs to be lengthened

So the passive is very natural here.

Malay nouns usually do not have to change form for singular vs. plural. The context tells you.

So:

• jarum can mean needle or needles
• benang can mean thread in a mass-noun sense
• lengan baju here is most naturally the sleeve, but context could affect interpretation

If Malay wants to make plurality very explicit, it can do so in other ways, but it is often left unstated.

Not usually in this sentence. Here kalau-kalau is better translated as in case or just in case.

If you translated it as if, the meaning would shift too much toward a normal condition. The Malay sentence is about preparation for a possible need, not just a plain if statement.

Baju can be broader than English shirt. It often refers to a top, shirt, blouse, or clothing item depending on context.

In lengan baju, though, it is very natural to understand it as shirt or garment, so the whole phrase means sleeve.

Malay often links nouns directly without using a separate word like English of.

So:

• lengan baju = literally arm shirt
• natural English = shirt sleeve / sleeve of the shirt

This noun-to-noun structure is very common in Malay.