plummet

• n. [測定]プラムボブ、ペンダント.
• vi.垂直に下がる；（価格?水準などが）急に下がる

古フランス語のplomet、鉛、鉛風船から、plomb、鉛、鉛風船、語源的にはplumbと同じ。比喩的用法。

plummet

plummet: see plumb

plummet (n.)

late 14c., "ball of lead, plumb of a bob-line," from Old French plomet "graphite, lead; plummet, sounding lead," diminutive of plom "sounding lead" (see plumb (n.)).

plummet (v.)

1620s, "to fathom, take soundings," from plummet (n.). Meaning "to fall rapidly" first recorded 1933, perhaps originally among aviators. Related: Plummeted; plummeting.

1. We 'd revise to rewire the building，re plummet re-plumb it.

ビルに電線を交換し、再び直立させなければならない。dd>

2.Stocks that plummet to half their value aren 't losers，they 're 'non-performers '.

株価が半分下落した人は敗者ではなく、「パフォーマンスが悪い」のです。

3.Mengniu and Yili have seen their shares plummet since the incident broke.

蒙牛と伊利の株式は事件発生以来、大幅に下落した。

4.The prices of the shares may ~ or plummet within one day.

株価は1日で急上昇したり、急落したりする可能性がある。

5.Pieces of rock plummet down the mountainside to the ground below.

岩の塊が山の急斜面に沿って地面に転がっている。