Английский разговорный словарь (основной) - plummet
Plummet
plummet
ˈplʌmɪt n. & v. --n. 1 a plumb or plumb-line. 2 a sounding-line. 3 a weight attached to a fishing-line to keepthefloatupright. --v.intr. (plummeted, plummeting) fall or plunge rapidly. [ME f. OF plommet dimin. (as PLUMB(1))]