Note: The translation for this entry is currently under quality review. Some content is temporarily displayed in English only.
onset
This term carries a heavy clinical or ominous weight. It is rarely used for positive beginnings, such as the start of a vacation or a romance, and is instead reserved for the arrival of diseases, storms, or periods of hardship. It suggests a threshold being crossed into a negative state. In medical and technical contexts, it describes the precise moment symptoms first appear. This creates a sense of an inevitable process starting to unfold, contrasting with words like start or beginning which are neutral and general.
Countable when referring to a specific instance of a beginning, such as the onset of a specific disease or the onset of a particular season.