noun
Refers to a phenomenon or event that foreshadows something, often something significant or ominous. Used in both everyday and literary contexts.
地震の前兆として、井戸の水が濁ることがある。
As a precursor to earthquakes, well water sometimes becomes muddy.
彼の突然の沈黙は、何か悪い知らせの前兆だった。
His sudden silence was an omen of some bad news.