Standard Lemma guide

deionize

verb · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

verb

Meaning 1

To remove the ions from; to deprive of ions.

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

Definition source: English Wiktionary via Wiktextract

Usage: physical, transitive

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: unionize

Antonyms: ionize

2

verb

Meaning 2

To remove the ions from; to deprive of ions.

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

Definition source: English Wiktionary via Wiktextract

Usage: physical, transitive

Topics: chemistry, natural-sciences, physical-sciences

Examples

  • Water can be deionized using ion exchange resins.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To be deprived of ions.

Definition source: English Wiktionary via Wiktextract

Usage: intransitive, physical

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

verb

Meaning 4

To be deprived of ions.

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

Definition source: English Wiktionary via Wiktextract

Usage: intransitive, physical

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: unionize

Antonyms: none provided

5

verb

Meaning 5

remove ions from

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: get rid of, remove

History

Etymology

Etymology tree Proto-Indo-European *de Proto-Indo-European *-h1 Proto-Indo-European *déh1 Proto-Italic *dē Latin dē Latin dē-der. English de- Proto-Indo-European *h1ey- Proto-Indo-European *h1éyti Proto-Hellenic *éimi Ancient Greek ἰόν (ión)der. English ion Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō)bor. Late Latin -izōder. Middle French -iserbor. Middle English -isen English -ize English ionize English deionize From de- + ionize.

Across languages

Translations

5 source translations are retained for this English entry.

  • Bulgarian: дейонизирам (dejoniziram) — to remove the ions from
  • Icelandic: afjóna — to remove the ions from
  • Māori: tango katote — to remove the ions from
  • Spanish: desionizar — to remove the ions from
  • Swedish: avjonisera — to remove the ions from