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Origin and history of plummet

plummet(n.)

late 14c., "ball of lead, plumb of a bob-line," from Old French plomet "graphite, lead; plummet, sounding lead," diminutive of plom "sounding lead" (see plumb (n.)).

plummet(v.)

1620s, "to fathom, take soundings," from plummet (n.). Meaning "to fall rapidly" is recorded from 1933, perhaps originally among aviators. Middle English plumben (see plumb (v.)) also meant "to plunge downward." Related: Plummeted; plummeting.

Entries linking to plummet

early 14c., "a mass of lead hung on a string to show the vertical line" (mid-14c. as "the metal lead"), from Old French *plombe, plomee "sounding lead," and directly from Late Latin *plumba, originally plural of Latin plumbum "lead (the metal), lead ball; pipe; pencil," a word of unknown origin; Beekes and de Vaan say it probably is unrelated to Greek molybdos "lead" (dialectal bolimos). It is perhaps a loan-word from an extinct language of the western Mediterranean (based on similarities of words in Berber and Basque). The -b was restored in English after c. 1400. Plumb-rule is attested from c. 1400.

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