verb
plummeted, plummeting
1.1
- no obj. fall or drop straight down at high speed快速落下, 陡直落下：
a climber was killed when he plummeted 300 feet down an icy gully.
一位登山者从300英尺高处陡然掉到一个冰谷里给摔死了。
1.2
- decrease rapidly in value or amount（在价值或数量上）骤然下跌, 陡然下降：
hardware sales plummeted.
硬件销售量陡然下降。
词源
late Middle English (as a noun)： from Old French plommet 'small sounding lead'， diminutive of plomb 'lead'. The current verb sense dates from the 1930s.