Lontaran itu masuk ke alur; kalau begitu, cuba menggolekkan bola perlahan.

Lontaran is a noun meaning something like a throw, a toss, or the throw depending on context.

It comes from the root lontar, which is a verb root related to throwing or casting. The ending -an often turns a root into a noun, so:

• lontar = to throw
• lontaran = a throw / a throwing / something thrown

This is very common in Malay. Compare:

• makan = eat
• makanan = food

So in this sentence, lontaran itu refers to that throw.

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

So:

• lontaran itu = that throw
• bola itu = that ball
• alur ini = this groove/lane

This is one of the first word-order differences English speakers notice. English says that throw, but Malay says throw that in word order.

Masuk means to enter, to go in, or to go into. The preposition ke is used to show movement to or into a place/direction.

So:

• masuk ke alur = go into the groove/lane/channel

In everyday Malay, masuk can sometimes appear without ke if the destination is obvious, but ke makes the direction clearer.

Compare:

• masuk rumah = enter the house
• masuk ke rumah = go into the house

Both can occur, but ke emphasizes the direction or destination a bit more clearly.

Alur can mean groove, channel, track, or lane, depending on context.

In this sentence, it sounds like a physical path or track that the thrown or rolled object should go into. If the overall context is something like bowling or a ball game, alur is probably being used for a lane, groove, or guided path.

A learner should know that many Malay nouns are somewhat broad in meaning, and the exact English word depends on the situation.

Yes, kalau begitu is a very common expression. It means something like:

• if that’s the case
• in that case
• well then
• if so

It is made up of:

• kalau = if
• begitu = like that / that way / so

Together, it often introduces the next step in reasoning:

• Lontaran itu masuk ke alur; kalau begitu, ...
• The throw went into the groove/lane; in that case, ...

So it connects the first observation with the advice that follows.

Cuba literally means try, but when placed before another verb, it often works like try to... or even a soft instruction like just try...

So:

• cuba menggolekkan bola perlahan = try rolling the ball slowly

This is very common in spoken and written Malay:

• Cuba lihat. = Try looking. / Take a look.
• Cuba buat begini. = Try doing it like this.

It can make a suggestion sound less direct and more polite or encouraging.

This is a very good question, because the suffix -kan changes the feel of the verb.

The root is golek, related to roll.

Possible forms include:

• bergolek = to roll (by itself, intransitive)
• menggolek = to roll something / to roll, but less common in this exact kind of instructional phrasing
• menggolekkan = to cause something to roll / to roll something

Here, menggolekkan bola clearly means to roll the ball.

The -kan often gives a causative sense: you are making the ball roll.

So:

• bola itu bergolek = the ball rolls / is rolling
• dia menggolekkan bola = he/she rolls the ball

In this sentence, -kan helps make the verb more clearly transitive and often causative.

That means the subject causes an object to undergo the action:

• menggolekkan bola = to roll the ball / to make the ball roll

This pattern is very common in Malay:

• jatuh = fall

• menjatuhkan = drop something / cause something to fall

• duduk = sit
• mendudukkan = seat someone / make someone sit

So in menggolekkan bola, the person is not rolling themselves; they are causing the ball to roll.

Both ideas are possible, but they are not exactly the same in feel.

Perlahan can function as slow or slowly, depending on context. In many sentences, Malay adjectives can also work adverbially without changing form.

So:

• menggolekkan bola perlahan = roll the ball slowly

You may also hear:

• menggolekkan bola perlahan-lahan

This sounds more explicitly adverbial and can feel a bit more natural in some contexts, like slowly or gently and slowly.

In other words:

• perlahan = slow / slowly
• perlahan-lahan = slowly, more clearly adverbial, often with a softer or more gradual feel

The sentence you were given is understandable and natural, but perlahan-lahan is also very common.

Malay often places adverb-like words after the verb phrase or object.

So:

• menggolekkan bola perlahan
  literally follows the order
  roll the ball slowly

This is actually similar to English in many cases, because English also often puts adverbs after the object:

• Roll the ball slowly

So although perlahan comes after bola, it modifies the action of rolling, not the noun bola itself.

The semicolon is mostly a punctuation choice showing that the two parts are closely related:

• Lontaran itu masuk ke alur
• kalau begitu, cuba menggolekkan bola perlahan

The first part states an observation. The second part gives a conclusion or suggestion based on it.

In normal Malay writing, you might also see a full stop or even a comma, depending on style:

• Lontaran itu masuk ke alur. Kalau begitu, cuba menggolekkan bola perlahan.

So the semicolon is not a special grammar rule here; it just links two closely connected ideas.

Yes. Depending on context, a speaker might choose slightly different wording. For example:

• Balingan itu masuk ke alur; kalau begitu, cuba golekkan bola perlahan.
• Kalau macam itu, cuba golekkan bola perlahan-lahan.

A few notes:

• balingan may sound more natural than lontaran in some contexts involving a throw
• kalau macam itu is a more conversational alternative to kalau begitu
• golekkan is a shorter imperative-like form often used in instructions
• perlahan-lahan is a very common way to say slowly

But the original sentence is still grammatical and understandable.