reudh- / Indo-European roots
Examples of words with the root reudh-: bilirubin, corroborate, erysipelas, erythema, erythro-, lollipop, red, rissole, roan, roble, roborant, robust, rooibos, rorqual, rouge, roux, rowan, rubefacient, rubella, rubeola, rubescent, rubicund, rubidium, rubiginous, rubric, ruby, ruddle, ruddock, ruddy, rufescent.
Red, ruddy.Oldest form *h1reudh-.
▲ Derivatives include red, robust, corroborate, ruby, rubric.
I. O-grade form *roudh-.
1. a. red from Old English rēad, red; b. rorqual from Old Norse raudhr, red; c. rooibos from Middle Dutch root, red. a-c all from Germanic *raudaz.
2. Perhaps ultimately also from Germanic raudaz is Old Spanish roán, roan, if from Gothic *rauths, red, or a kindred Germanic source. roan
3. rowan from a source akin to Old Norse reynir, mountain ash, rowan (from its red berries), from Germanic *raudnia-.
4. rufescent, rufous from Latin rūfus (of dialectal Italic origin), reddish.
5. rouille, rubiginous from Latin rōbus, red.
6. roble, roborant, robust; corroborate, rambunctious from Latin rōbur, rōbus, red oak, hardness, and rōbustus, strong.
7. lollipop perhaps from Romani lolo, red, from Middle Indic lohita-, from Sanskrit.
II. Zero-grade form *rudh-.
1. Suffixed form *rudh-ā-. a. ruddle from Old English rudu, red color; b. ruddock from Old English rudduc, robin; c. ruddy from Old English rudig, ruddy. a-c all from Germanic *rudō.
2. Suffixed form *rudh-sto-. rust from Old English rūst (also rust?), rust, from Germanic *rust-.
3. rouge, rubeola, ruby; rubefacient from Latin rubeus, red.
4. rubicund from Latin rubicundus, red, ruddy.
5. rubidium from Latin rūbidus, red.
6. Suffixed (stative) form *rudh-ē-. rubescent from Latin rubēre, to be red.
7. Suffixed form *rudh-ro-. a. rubella, rubric; bilirubin from Latin ruber, red; b. rutilant, rutile from Latin rutilus, reddish; c. erythema, erythro- from Greek eruthros, red (with prothetic vowel from oldest zero-grade form *ərudh-); d. erysipelas from possibly remade Greek erusi-, red, reddening.
8. Suffixed form *rudh-to-. rissole, roux, russet from Latin russus, red.
[Pokorny reudh- 872.]