Meaning of PLUMMET in English
/ ˈplʌmɪt; NAmE / verb
[ v ] to fall suddenly and quickly from a high level or position
SYN plunge :
Share prices plummeted to an all-time low.
Her spirits plummeted at the thought of meeting him again.
The jet plummeted into a row of houses.
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.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005