"beating with a loud sound," 1822, from Latin plangentem (nominative plangens), present participle of plangere "to strike, beat" (from PIE root *plak- (2) "to strike"). Related: Plangently; plangency.
the plangent minority
plangent bells
planeness
planet
planetarium
planetary
planetoid
plangent
plani-
planisphere
plank
planktology
plankton