Baja itu disimpan di luar.

In Malay, demonstratives like ini and itu usually come after the noun.

• baja itu = that fertilizer or the fertilizer
• rumah itu = that house / the house

This is normal Malay word order. So where English says that fertilizer, Malay says fertilizer that.

In many sentences, itu can also make the noun sound more definite, so baja itu often feels like the fertilizer as well as that fertilizer, depending on context.

disimpan is the verb simpan with the prefix di-.

• simpan = to store, keep
• disimpan = is stored, is kept, stored/kept

The prefix di- usually marks a passive verb in standard Malay. So Baja itu disimpan di luar literally has the sense of:

• The fertilizer is stored outside
• That fertilizer is kept outside

The focus is on the fertilizer, not on who stored it.

Yes. It is a passive sentence.

• Baja itu disimpan di luar. = The fertilizer is stored outside.

If you wanted a more active version, you could say something like:

• Mereka menyimpan baja itu di luar. = They store the fertilizer outside.

So the passive form is useful when the doer is unknown, unimportant, or obvious from context.

No. They look the same, but they are doing two different jobs.

1. di- in disimpan is a prefix attached to the verb.
   It marks the passive.

   • disimpan = is stored / is kept

2. di in di luar is a preposition meaning in, at, on, depending on context.

   • di luar = outside

A very important spelling rule:

• di- as a verb prefix is written together with the verb: disimpan
• di as a preposition is written separately: di luar

So disimpan is one word, but di luar is two words.

Malay often does not use a separate word for is / am / are the way English does.

In this sentence, the meaning of is stored is already contained in disimpan, so no extra word like is is needed.

That is very normal in Malay. For example:

• Rumah itu besar. = The house is big.
• Pintu itu dibuka. = The door is opened / opened

So do not expect Malay to always include a separate verb like to be.

di luar means outside or outdoors.

• di = at/in
• luar = outside, exterior

Together, di luar means outside.

In this sentence, it tells you the location where the fertilizer is stored.

Some related expressions:

• di dalam = inside
• di atas = on top / above
• di bawah = under / below

Yes. In many contexts, baja itu can be understood as either:

• that fertilizer
• the fertilizer

Malay does not use articles exactly like English the and a. The word itu often helps make something specific or definite, so it can overlap with English the.

Which translation is best depends on context.

Yes, Baja disimpan di luar is possible, but it changes the feel a little.

• Baja itu disimpan di luar. = The/that fertilizer is stored outside.
• Baja disimpan di luar. = Fertilizer is stored outside or Fertilizer is kept outside

Without itu, the noun sounds less specifically identified. It can feel more general, depending on the situation.

Yes. disimpan is flexible. Depending on context, it can mean:

• is stored
• is kept
• sometimes even is put away

So in this sentence, a natural English translation could be:

• The fertilizer is stored outside.
• The fertilizer is kept outside.

The best choice depends on the style and context of the English translation.

The sentence follows a common Malay pattern:

• Baja itu = topic/subject noun phrase
• disimpan = passive verb
• di luar = place expression

So the structure is roughly:

noun phrase + passive verb + location

That gives:

• Baja itu disimpan di luar.

This word order is very natural in Malay.