Learn how to say Plummet correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word plummet:
verb (plummets, plummeting, plummeted)
fall or drop straight down at high speed:
a climber was killed when he plummeted 300 feet down an icy gully
decrease rapidly in value or amount:
hardware sales plummeted
1a steep and rapid fall or drop:
the bird has a circular display flight followed by an earthward plummet
2a plumb or plumb line.
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
Spell plummet with a double m and a single t.