A single Malay word has independently recorded counterparts in the Sulu Archipelago, Polynesia, Puerto Rico, and even the royal courts of India. These regions are separated by three different oceans and never shared a direct linguistic tradition. That word is amuk, known internationally as amok.
The word amuk comes from the Proto-Malayo-Polynesian root hamuk, meaning "to attack." In the Malay world, it evolved into mengamuk, which roughly means "to launch a frenzied attack in a fit of overwhelming rage."
Its journey, however, did not end in the Strait of Malacca.
Through colonial trade networks, the word entered several European languages before eventually becoming a recognized term in international psychiatry. Along the way, researchers identified remarkably similar behavioral phenomena in regions separated by vast distances, with no direct geographical or cultural connections.
Its Origins in the Strait of Malacca
The earliest European record of amuk appears in The Book of Duarte Barbosa, written around 1516 by the Portuguese trader Duarte Barbosa. He described Javanese men who would "go out into the streets, and kill as many persons as they meet," referring to them as Amuco.
The account was written only five years after Portugal conquered Malacca in 1511. At the time, European merchants were just beginning to establish their own trading networks in a region that had long been dominated by Malay, Javanese, Indian, and Chinese merchants.
The term spread alongside the successive colonial powers that controlled the Strait of Malacca. It passed from the Portuguese to the Dutch after 1641, and later to the British in the late eighteenth century.
Each colonial power left its own linguistic imprint. Portuguese sources recorded forms such as amouco and amuco. English eventually adopted the word as amok or amuck, while the expression "run amok" first appeared in the 1670s.
This linguistic diffusion was made possible because Bazaar Malay, the trade variety of the Malay language, had already become the principal lingua franca of maritime Southeast Asia by the late Middle Ages. Malacca itself was one of the world's busiest trading ports during this period.
The Philippines: Juramentado in the Sulu Archipelago
In the Philippines, a phenomenon that closely resembles amuk developed under a different name: juramentado.
The term was coined in 1876 by Spanish Governor-General José Malcampo. It derives from the Spanish verb juramentar, meaning "to take an oath."
The term became closely associated with the Moro communities of Mindanao, particularly those in the Sulu Archipelago. It has survived into modern Philippine languages in the form huramentado.
Across the Pacific and Atlantic
The farther researchers looked beyond the Malay Archipelago, the more striking the similarities became. In Polynesia, a comparable phenomenon is known as cafard. In Puerto Rico, across the Atlantic Ocean, it is called mal de pelea. Among the Navajo people of North America, a similar condition is referred to as iich'aa.
Researchers have also drawn comparisons with the berserkers of Scandinavian legend. These warriors were said to enter battles in an uncontrollable state of rage, losing awareness of their own actions. The descriptions closely resemble historical accounts of amuk recorded in the Malay Archipelago.
These cross-cultural similarities became one of the main reasons why amuk gradually stopped being viewed as a phenomenon unique to a single culture.
India: An Incident at Shah Jahan's Court
According to the 11th edition of the Encyclopædia Britannica (1911), amuk was also documented among the Rajputs of the Indian subcontinent.
In 1634, the eldest son of the ruler of Jodhpur reportedly went amok at the court of the Mughal Emperor Shah Jahan. Although he failed to attack the emperor, he killed five court officials during the incident.
A similar case was also recorded in Hyderabad, Sindh, during the eighteenth century.
From a Trade Word to a Global Psychiatric Term
In 1849, amuk was formally classified as a psychiatric condition following a series of case studies that found many of its perpetrators had some form of mental disorder.
The term was later included in the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR) as an example of a culture-bound syndrome, a condition considered characteristic of a particular culture.
However, the fifth edition (DSM-5) removed the entire category of culture-bound syndromes. As a result, amuk is no longer classified separately. The change reflects a broader understanding that this type of behavior represents a more universal pattern of psychopathology rather than a phenomenon exclusive to any single culture.
In Indonesia, the meaning of the word has also evolved. Today, amuk is more commonly used to describe mob violence or collective unrest. Acts of violence committed by individuals are more often described as gelap mata, literally meaning "blinded by rage."
It serves as the modern expression for a phenomenon first documented by European observers on the coast of Java more than five centuries ago.
