harbinger
🇺🇸
/ˈhɑːrbɪndʒər/
🇬🇧
/ˈhɑːbɪndʒə(r)/
something that shows something else is going to happen soon
The sudden drop in temperature was a harbinger of the coming winter.
气温的突然下降是即将到来的冬天的预兆。