Etymograph

English

radio-

Radio- comes from Latin radius ‘ray’.

  1. Latinc. 75 BCE–200 CEradius1‘ray’
  2. Englishtodayradio-1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English radio-

Earlier history uncertain. See Wiktionary.

Lineage

  1. Latinc. 75 BCE–200 CEradiusWiktionary, English radio-‘ray’
  2. Englishtodayradio-Wiktionary, English radio-

Linked words

through Latin radius ‘ray’

ray, laser, radiation, radius, radiant, radial, rayon, radiate, 7 more

Today it means

prefix radiation, radioactive

Sources

Sources: Wiktionary, “radio-”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Latin radius / radio-

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