Abunai (危ない, あぶない) – Using and meaning

In Japanese, the word abunai (危ない, あぶない) covers a range of meanings that English have to split across different registers. Dictionaries define it as “dangerous, risky, hazardous.” The boundary between these shades is not drawn as sharply in Japanese as it is in European languages.

Here abunai functions as an ordinary predicative adjective, giving an evaluation of a situation or action. It carries no stylistic coloring beyond that evaluation.

But abunai has a second use – as an exclamation. If you see someone walking straight into the path of an oncoming car, you shout: Abunai! In English, “Look out!” or “Watch out!” conveys this most precisely. So the same word works both as a calm statement of danger and as an instantaneous shout of warning.

Curiously, in this function – an exclamation of warning -Japanese uses not only abunai. Urusai (煩い, うるさい) literally “[you are] noisy,” but in actual use meaning “Be quiet!” or “Shut up!” Formally they are adjectives, but at the moment of the shout they turn into an imperative. This is how the language economizes: there is no need to build a separate imperative construction if the word itself can already sound as a command.

Dictionaries, in fact, record abunai in two guises: as an adjective meaning “dangerous, risky, unreliable” and as an exclamation warning of danger. In the first case it describes; in the second it acts.