Berusad

Berusad is an Indonesian adjective that denotes a state of rust or corrosion, typically describing metals that have developed a reddish-brown oxide layer due to exposure to moisture and air. The term is not common in modern standard Indonesian; more common terms for rust are berkarat or karat.

In linguistic use, berusad is seen as a less frequent, sometimes literary or regional form. The prefix ber- in Indonesian often marks a state or condition, and berusad would theoretically describe something that is covered in or characterized by rust. Because it is not widely attested in contemporary dictionaries, berusad is usually encountered in regional speech, historical texts, or creative writing rather than everyday conversation. When conveying the idea of rust in common usage, speakers typically choose berkarat or karat, which are clearer and more widely understood.

Etymology and usage notes are limited, and berusad is regarded as a marginal or archaic variant rather than a standard term. Its appearance may be motivated by stylistic aims, such as evoking age, neglect, or nautical environments where metal is subject to corrosion. For practical purposes, most writers and editors would prefer berkarat to express rust, while berusad may appear as a deliberate stylistic choice in certain dialects or historical passages.

See also: Karat, Berkarat, Rust, Corrosion.