Etymology

carious

ca·ri·ous
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Today it means: Having caries (bone or tooth decay); decayed, rotten. Full definition →

French carieux ← Latin cariēs ← Proto-Italic *kazēō
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The story

  1. Proto-Indo-European · derived from*-went-
  2. Old Latin · derived from-ōsos
  3. Latin · derived from-ōsus“full of, prone to”
  4. French · derived from-eux“-ous”
  5. Proto-Indo-European · derived from*ḱes-“to cut”
  6. Proto-Italic · derived from*kazēō“to lack”
  7. Latin · derived fromcariēs“rot, rottenness, corruption”
  8. French · derived fromcarieux“carious”
  9. English todaycarious

From French carieux (“carious”), from carie (“decay (of bone or teeth)”) (from Latin cariēs (“rot, rottenness, corruption”), from careō (“to lack, be deprived of”), from Proto-Italic *kazēō (“to lack”), possibly from Proto-Indo-European *ḱes- (“to cut”).) + French -eux (“-ous”) (from Latin -ōsus (“full of, prone to”), from Old Latin -ōsos, ultimately from Proto-Indo-European *-went-, *-wont- + *-to-)).

Words from the same roots

Latincariēs all →

caries

Proto-Indo-European*ḱes- all →

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Etymology from Wiktionary, CC BY-SA 4.0.