also depolarisation, "act of depriving of polarity or removing the effects of polarization," 1814; see de- + polarization. Perhaps an agent noun to depolarize "deprive of polarity," which is attested from 1813 (implied in depolarized), originally in optics.
depletive
deplorable
deplore
deploy
deployment
depolarization
depoliticize
deponent
depopulate
depopulation
deport
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