This is the 19th most frequent Malay word.
atau
"Or."
Here, "atau" is used to present two options, inviting the listener to choose one.
Adakah anda ingin minum teh atau kopi?
Do you want to drink tea or coffee?
Here, "atau" expresses an uncertain location between two possibilities.
Buku itu ada di meja atau di rak buku.
The book is either on the table or on the bookshelf.
In this sentence, "atau" introduces a possible consequence, depending on the preceding action.