acak

Acak is a word used in Indonesian and Malay that relates to disorder and randomness. As a verb, acak means to mix up, scatter, or rummage. As an adjective or adverb, it denotes a lack of pattern, equivalent to "random" or "at random" in English. The word is commonly used with phrases such as disusun secara acak to indicate an arrangement without a fixed pattern.

Common constructions include mengacak-ngacak, meaning to rummage through something or to tousle someone's hair: Dia mengacak-ngacak rambutnya mencari kunci. The expression disusun secara acak, angka acak, pemilihan acak are used to indicate randomness or randomization in everyday language.

In statistics and probability, acak is used in terms such as variabel acak (random variable) and pengacakan (randomization). The word also appears in Malay with similar meanings related to disorder and unpredictability, reflecting its shared linguistic heritage.