R
| Root | Meaning in English | Origin language | Etymology (root origin) | English examples |
|---|---|---|---|---|
| rad-, ras- | scrape, shave | Latin | radere, rasus | abrade, abrasion, erasure |
| radi- | beam, spoke | Latin | radius, radiare | radiance, radiation |
| radic- | root | Latin | rādix, rādīcis | eradicate, radical |
| ram- | branch | Latin | rāmus | ramification, ramose |
| ran- | frog | Latin | rana | Rana |
| ranc- | rancidness, grudge, bitterness | Latin | rancere | rancid, rancor |
| rap- | turnip | Latin | rapum | rapeseed |
| raph- | seam | Greek | ῤαφή (rhaphē) | |
| rar- | Latin | rarus | rarity | |
| rauc- | harsh, hoarse | Latin | raucus | raucous |
| re-, red- | again, back | Latin | re- | recede, redact |
| reg-, -rig-, rect- | straight | Latin | regere, rectus | dirigible, erect, erection, rectum |
| rem- | oar | Latin | remus | bireme, trireme |
| ren- | kidney | Latin | renes | renal |
| rep-, rept- | crawl, creep | Latin | repere, reptus | reptile |
| ret- | net | Latin | rete | reticle, retina |
| retro- | backward, behind | Latin | retro | retrograde, retrospective, retrovirus |
| rhabd- | rod | Greek | ῥάβδος (rhabdos) | rhabdoid, rhabdom |
| rhach-, rach- | spine | Greek | ῥάχις, ῥάχεως (rhachis) | rhachiodont |
| rhag- | tear, rent | Greek | ῥαγίζω | rhagades |
| rhe- | flow | Greek | ῥεῖν (rhein) | rheostat |
| rhig- | chill | Greek | ῥῖγος (rhigos) | rhigosaurus |
| rhin- | nose, snout | Greek | ῥίς, ῥινός (rhis, rhinos) | rhinoplasty |
| rhiz- | root | Greek | ῥίζα (rhiza) | rhizome |
| rhod- | rose | Greek | ῥόδον (rhodon) | rhododendron |
| rhomb- | spinning top | Greek | ῥόμβος (rhombos) | rhombus |
| rhynch- | snout | Greek | ῥύγχος | Rhynchobatus |
| rid-, ris- | laugh | Latin | ridere, risus | derision, ridicule |
| robor- | oak, strength | Latin | robur, roboris | corroboration |
| rod-, ros- | gnaw | Latin | rodere, rosus | corrode, erosion, rodent |
| rog- | ask | Latin | rogare | derogatory, interrogation |
| rostr- | beak, prow | Latin | rostrum | rostral, rostriform, rostrum |
| rot- | wheel | Latin | rota, rotare | rotation, rotunda |
| ruber-, rubr- | red | Latin | ruber | rubric, ruby |
| rug- | wrinkle | Latin | ruga, rugare | corrugation |
| rumin- | throat | Latin | rumen, ruminis | rumination |
| rump-, rupt- | break | Latin | rumpere, ruptus | eruption, rupture, interrupt |
| rur- | country | Latin | rus, ruris | rural |
Read more about this topic: List Of Greek And Latin Roots In English