From OE. plommet, recorded since 1382, "ball of lead, plumb of a bob-line," from OF. plommet or plomet, the diminutive of plom, plum, 'lead, sounding lead', itself from French plomb, from L. plumbum. The verb is first recorded in 1626, originally
meaning "to fathom, take soundings," from the noun.
archaic: A piece of lead attached to a line, used in sounding the depth of water.
#:I'll sink him deeper than e'er plummet sounded. -Shak.
archaic: A plumb bob or a plumb line. See under plumb, n.
archaic: Hence, any weight.
archaic: A piece of lead formerly used by school children to rule paper for writing
- hence a plummet line, a line with a plummet; a sounding line.
trans-top|lead on a line
- To drop swiftly, in a direct manner; to fall quickly.
#: After its ascent, the arrow plummeted to earth.
Dutch: omlaagschieten, tuimelen
R:Online Etymology Dictionary