Toilet itu ada di dekat lift.

In Indonesian, demonstratives usually come after the noun.

• toilet itu = that toilet / sometimes the toilet
• buku ini = this book

So the normal pattern is:

• noun + ini = this ...
• noun + itu = that ...

This is different from English, where this and that come before the noun.

It can feel like either one, depending on context.

In a literal sense, itu means that. But in real Indonesian, it is also often used to make a noun more specific, so it can sound like English the.

So toilet itu could be understood as:

• that toilet
• the toilet already being talked about or already known

Indonesian does not have a direct article system like English a/an/the, so words like itu often help show definiteness.

Ada often means to exist, to be present, or to be located.

In this sentence, ada helps express location:

• Toilet itu ada di dekat lift. = The toilet is located near the lift.

So even though English uses is, Indonesian often uses ada when saying where something is.

Sometimes, yes.

You may hear:

• Toilet itu di dekat lift.

This can also mean The toilet is near the lift.

However, ada is very common and natural when talking about where something is located. It gives a clear sense of being there / being situated there.

So:

• Toilet itu ada di dekat lift. = very natural
• Toilet itu di dekat lift. = also possible, often a bit simpler or more conversational depending on context

Because di here is a preposition, not a verb prefix.

• di dekat = near / in the area near
• di
  • place word is written separately

So:

• di dekat lift = near the lift
• di kantor = at the office
• di rumah = at home

This is different from the passive prefix di-, which is attached to a verb:

• dibuka = opened
• ditulis = written

A useful rule:

• di
  • location = separate
• di-
  • verb = attached

Dekat means near or close.

In di dekat lift, it means near the lift.

You may also see dekat used in slightly different patterns, such as:

• Rumah saya dekat sekolah. = My house is near the school.
• Rumah saya dekat dengan sekolah. = My house is close to the school.

So dekat is the key word meaning near, and di helps form the location phrase di dekat ...

Yes. Lift is a normal and widely understood Indonesian word for elevator.

In many buildings, signs may say:

• lift
• sometimes elevator

But lift is very common in Indonesian usage.

So di dekat lift is a perfectly natural phrase.

Toilet is very common and natural, especially on signs and in public places.

You might also hear:

• WC
• kamar mandi = bathroom
• kamar kecil = restroom/toilet, a bit more indirect or polite in some contexts

But in a sentence like this, toilet is completely normal.

The structure is:

• Toilet itu = the noun phrase
• ada = is located / exists
• di dekat lift = location phrase

So the pattern is basically:

• [thing] + ada + [location]

Examples:

• Buku itu ada di meja. = The book is on the table.
• Mobilnya ada di luar. = The car is outside.
• Toilet itu ada di dekat lift. = The toilet is near the lift.

This is a very useful pattern for everyday Indonesian.