Adik saya mudah mabuk laut, jadi dia memilih duduk di kabin kecil.

Adik means younger sibling, so it can mean either younger brother or younger sister.

Indonesian often does not specify gender unless it needs to. So:

• adik saya = my younger sibling
• depending on context, it may be translated as my younger brother or my younger sister

If you specifically want to say brother or sister, you can use:

• adik laki-laki = younger brother
• adik perempuan = younger sister

In Indonesian, possession usually works as:

noun + possessor

So:

• adik saya = my younger sibling
• rumah saya = my house
• teman saya = my friend

This is different from English, where the possessor usually comes first: my sibling.

So saya adik would not mean my younger sibling.

Yes, mudah often means easy, but in this sentence it has a slightly different feel.

In mudah mabuk laut, mudah means something like:

• easily
• prone to
• likely to

So mudah mabuk laut means:

• easily gets seasick
• is prone to seasickness

This is a very natural use of mudah in Indonesian.

Literally:

• mabuk = drunk, intoxicated, dizzy, nauseated depending on context
• laut = sea

But as a fixed expression, mabuk laut means seasick.

Indonesian uses mabuk in several motion-sickness expressions, for example:

• mabuk laut = seasick
• mabuk perjalanan = travel sickness / motion sickness
• mabuk udara = airsick

So here mabuk is not about alcohol. It is about feeling sick from motion.

Indonesian often does not need a separate verb like get in places where English does.

So:

• dia mabuk laut can mean he/she is seasick or he/she gets seasick, depending on context
• mudah mabuk laut naturally means easily gets seasick

Indonesian frequently leaves tense and certain helper verbs unstated if the meaning is already clear from context.

Jadi here means:

• so
• therefore
• as a result

It connects the first idea to the result:

• Adik saya mudah mabuk laut = My younger sibling gets seasick easily
• jadi dia memilih duduk di kabin kecil = so he/she chose to sit in the small cabin

Be aware that jadi can also mean become in other sentences, but here it is a conjunction meaning so.

Dia is a third-person singular pronoun meaning:

• he
• she

Indonesian does not usually mark gender in pronouns.

So dia memilih can mean either:

• he chose
• she chose

You understand the gender from context, if it matters at all.

Yes, Indonesian often repeats the subject for clarity, especially after a connector like jadi.

So:

• Adik saya mudah mabuk laut, jadi dia memilih duduk di kabin kecil.

sounds clear and natural.

Sometimes the subject can be omitted if the context is obvious, but repeating dia makes the sentence smoother and easier to follow.

For a learner, it is good to notice that Indonesian often allows omission, but it also often keeps the pronoun when it helps clarity.

In Indonesian, after some verbs, another verb can follow directly without a word meaning to.

So:

• memilih duduk = choose to sit
• literally: choose sit

This is completely normal in Indonesian.

Other similar examples:

• ingin makan = want to eat
• mulai belajar = start studying
• coba lihat = try to look

So you do not need a separate word for to before duduk.

Di is a preposition meaning in, at, or on, depending on context.

So:

• di kabin kecil = in the small cabin

The word order is:

• kabin = cabin
• kecil = small

In Indonesian, adjectives usually come after the noun, not before it.

So:

• kabin kecil = small cabin
• rumah besar = big house
• mobil baru = new car

This is one of the most important word-order differences from English.

It can mean either, depending on context.

Indonesian does not have articles like a, an, and the, so:

• di kabin kecil could mean in a small cabin
• or in the small cabin

English translation chooses whichever sounds most natural in context.

So the Indonesian phrase itself does not force one of those choices the way English does.

Indonesian verbs do not change form for tense the way English verbs do.

So:

• memilih by itself does not automatically mean only chooses or only chose
• context tells you the time

In this sentence, the overall meaning may suggest a past event or a general action, depending on the situation. If Indonesian needs to make time clearer, it often adds time words such as:

• kemarin = yesterday
• tadi = earlier
• sekarang = now
• besok = tomorrow

Without a time word, the sentence stays more neutral, and English translators choose the tense that best fits the context.