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1. Oxford Dictionary

   plummet

   • IPA[ˈplʌmɪt]

   英式

   • v.
     fall or drop straight down at high speed；decrease rapidly in value or amount
   • n.
     a steep and rapid fall or drop；a plumb or plumb line.

   • noun: plummet, plural noun: plummets

2. • 釋義

   v.

   動詞

   • 1. fall or drop straight down at high speed a climber was killed when he plummeted 300 feet down an icy gully 同義詞 plunge, fall headlong, hurtle, nosedive, dive, ... 更多drop, crash, descend rapidly
   • ▪ decrease rapidly in value or amount hardware sales plummeted 同義詞 fall steeply/sharply, plunge, tumble, drop/decrease rapidly, go down, ... 更多sink, slump, informalcrash, nosedive, take a nosedive

   n.

   名詞

   • 1. a steep and rapid fall or drop the bird has a circular display flight followed by an earthward plummet
   • 2. a plumb or plumb line.