plummet
US /ˈplʌm.ɪt/
UK /ˈplʌm.ɪt/

1.
cair, despencar
fall or drop straight down at high speed
:
•
The plane plummeted to the ground after engine failure.
O avião caiu no chão após a falha do motor.
•
The stone plummeted into the deep well.
A pedra caiu no poço profundo.