deionize

D2E1I1O1N1I1Z10E1

verb

To cause (an ionized substance) to return to a neutral state; to convert (an ion) into a neutral atom or molecule.

“Water can be deionized using ion exchange resins.”

Similar
Opposite
ionizeionate
Scrabble 18

Meanings

verbdeionize (third-person singular simple present deionizes, present participle deionizing, simple past and past participle deionized)

present singular third person deionizes · participle present deionizing · participle past deionized · past deionized · alternative de-ionize · alternative deionise · alternative de-ionise

  1. To remove the ions from; to deprive of ions.
    1. physicaltransitivechemistryTo cause (an ionized substance) to return to a neutral state; to convert (an ion) into a neutral atom or molecule.

      Synonyms: unionize · Antonyms: ionize

    2. physicaltransitivechemistryTo remove the ionic constituents from (a liquid, e.g. water).

      Water can be deionized using ion exchange resins.

  2. intransitivephysicalchemistryTo be deprived of ions.
    1. intransitivephysicalchemistryOf an ionized substance, to return to a neutral state.

      In the acidic medium at pH 2.0, amino, imino and hydroxyl groups of the hybrid are protonated and KP [ketoprofen] deionizes and becomes less soluble [36]; this leads to a decrease in the release rate and percentage of KP.

      2021 October, Islam M. Minisy, Nehal A. Salahuddin, Mohamad M. Ayad, “In vitro release study of ketoprofen-loaded chitosan/polyaniline nanofibers”, in Polymer Bulletin, volume 78, →DOI, page 5616
      1 more example

      Sparks have been made with durations as light sources down to a few nanoseconds, the advantage being that the ionized gas which created the light can deionize and dissipate its heat sufficiently quickly whereas a discharge in gases like xenon in a bottle deionizes and dissipates more slowly.

      1981 June 25, George H. Lunn, “High-speed photography”, in Nature, volume 291, →DOI, page 618

      Synonyms: unionize

Synonyms & antonyms

verbTo cause (an ionized substance) to return to a neutral state; to convert (an ion) into a neutral atom or molecule.

Similar
Opposite

verbOf an ionized substance, to return to a neutral state.

Similar

More synonyms by meaning

verbdeprive of ions

Opposite
ionate

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*de
  2. Proto-Indo-European*déh₁
  3. Proto-Italic*dē
  4. Latindē
  5. Latindē-
  6. Englishde-
  7. Proto-Indo-European*h₁ey-
  8. Proto-Indo-European*h₁éyti
  9. Proto-Hellenic*éimi
  10. Ancient Greekἰόν (ión)
  11. Englishion
  12. Englishionize
  13. Englishdeionize

From de- + ionize.

Full word history & related roots →

Translations

Bulgarian дейонизирам
  • дейонизирам (dejoniziram)to remove the ions from
Icelandic afjóna
  • afjónato remove the ions from
Māori tango katote
  • tango katoteto remove the ions from
Spanish desionizar
  • desionizarto remove the ions from
Swedish avjonisera
  • avjoniserato remove the ions from
Cite this entry
APA

deionize. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/deionize

MLA

“deionize.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/deionize. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “deionize,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/deionize.

Source: deionize on Wiktionary, CC BY-SA 4.0.