plummet [plummeted, plummeting, plummets](to drop swiftly, in a direct manner; to fall quickly) verb [UK: ˈplʌ.mɪt] [US: ˈplʌ.mət]Temperatures have plummeted. = Le temperature sono precipitate.
tumble [tumbled, tumbling, tumbles](to fall end over end) verb [UK: ˈtʌm.bl̩] [US: ˈtʌm.bl̩]