Nat itu masih kosong.

Indonesian often leaves out the verb to be in simple sentences.

So where English says Nat is still empty, Indonesian can simply say Nat itu masih kosong without any separate word for is.

This is very normal with:

• nouns
• adjectives
• many descriptive phrases

For example:

• Dia guru. = He/She is a teacher.
• Kamar itu besar. = That room is big.
• Tempat itu kosong. = That place is empty.

Itu usually means that, but in sentences like this it often works more naturally as that/the one in question or helps mark something as already known in the conversation.

So Nat itu can sound like:

• that Nat
• Nat over there
• Nat in question
• sometimes just a more natural, definite Nat

In real Indonesian, itu after a noun is very common when the speaker is talking about a specific, identifiable thing.

Yes, you often can.

Nat masih kosong is possible and may sound a bit more direct or less specifically pointed out.

Adding itu can make it sound like:

• the speaker is referring to a particular Nat
• the thing has already been mentioned
• the speaker is pointing it out more clearly

So both can work, but itu adds a sense of definiteness or reference.

Masih means still.

It shows that a condition continues from before up to now.

So masih kosong means:

• still empty
• still unoccupied
• still available depending on context

Compare:

• Kosong. = Empty.
• Masih kosong. = Still empty.

No. Kosong is broader than just a physically empty space.

It can mean:

• empty
• blank
• unoccupied
• vacant
• available

Examples:

• Kamar itu kosong. = The room is empty/vacant.
• Formulirnya masih kosong. = The form is still blank.
• Jadwal saya kosong besok. = My schedule is free tomorrow.

So in Nat itu masih kosong, the exact nuance depends on what Nat refers to.

A very common Indonesian sentence pattern is:

subject + description

Here:

• Nat itu = the subject
• masih kosong = the description

So the structure is very natural:

• Nat itu → what we are talking about
• masih kosong → what is true about it

This is similar to:

• Rumah itu besar. = That house is big.
• Kursi ini rusak. = This chair is broken.

Not necessarily.

Without context, Nat could be:

• a name or nickname
• a label
• an abbreviation
• the name of a room, slot, field, or item

That matters because kosong is usually used for things like rooms, spaces, forms, schedules, and positions. If Nat is a person, the meaning would depend heavily on context and may sound unusual unless Nat refers to something associated with that name.

So learners usually need context to know exactly what Nat is.

A simple pronunciation guide:

• masih ≈ MAH-seeh
• kosong ≈ KOH-song

A few notes:

• a in masih is like the a in father
• o in kosong is a clear pure vowel, not a diphthong like in many English accents
• final -ng in kosong is the same sound as in English song

Indonesian pronunciation is usually quite regular, so once you know the spelling, it is easier to pronounce than English.

Yes. Even if the general meaning is already clear, English translations may vary depending on context.

Possible translations include:

• is still empty
• is still blank
• is still vacant
• is still unoccupied
• is still available

Indonesian often uses one adjective, kosong, in places where English chooses different words. So the best translation depends on what Nat refers to.

It is neutral and natural Indonesian.

None of the words are slang, and the sentence works in everyday conversation. In more formal writing, the exact sentence might change depending on what Nat is, but grammatically there is nothing especially informal about Nat itu masih kosong.

It sounds like ordinary standard Indonesian.