plummet
verb
[ ˈplʌmɪt ]
• fall or drop straight down at high speed.
• "a climber was killed when he plummeted 300 feet down an icy gully"
plummet
noun
• a steep and rapid fall or drop.
• "the bird has a circular display flight followed by an earthward plummet"
• a plumb or plumb line.
Origin:
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.
