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List of Greek and Latin roots in English/R

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Lists of Greek and Latin roots in English beginning with other letters:

R

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Root Meaning in English Origin language Etymology (root origin) English examples
rad-, ras- scrape, shave Latin rādere, rāsus abrade, abrasion, abrasive, corrade, corrasion, erase, erasure, nonabrasive, radula, radular, raduliform, rase, rash, rasorial, raster, rasure, subradular
radi- beam, spoke Latin radius, radiāre radiance, radiation
radic- root Latin rādix, rādīcis eradicate, radical, radix
ram- branch Latin rāmus ramification, rammel, ramose, ramous, ramulose, ramulous
ran- frog Latin rāna Rana
ranc- rancidness, grudge, bitterness Latin rancere rancid, rancor
rap- rob, seize Latin rapere, raptus arreption, arreptitious, enrapt, enrapture, rapacious, rapacity, rape, rapid, rapidity, rapine, rapt, raptio, raptor, raptorial, rapture, rapturous, raptus, ravenous, ravine, ravish, subreption, subreptitious, surreptitious
rap- turnip Latin rāpum rapeseed
raph-[1] sew, seam Greek ῥάπτειν (rháptein), ῤαφή (raphḗ) raphae, raphe
rar- rare Latin rārus rarity
rauc- harsh, hoarse Latin raucus raucous
re-, red- again, back Latin re- recede, redact
rect-, reg-, -rig- straight, direct Latin regere "to direct, lead straight, guide", related rectus "straight, right" correct, direct, dirigible, erect, erection, ergo, rectangle, rectify, rectitude, rectum, regent, regime, regimen, regiment, region, surge
reg-, rex- king Latin rex (genitive regis) regal, regency, regicide, Regis, regulation, reign, rex, royal
regul- rule Latin rēgula "to rule" regular, regulate, regulation, rule
rem- oar Latin rēmus bireme, trireme
ren- kidney Latin rēnēs renal
rep-, rept- crawl, creep Latin rēpere, reptus reptile
resid- left behind Latin residere "remain behind" (see also sedere) reside, residence, resident, residual, residue
ret- net Latin rēte reticle, retina
retro- backward, behind Latin retrō retrograde, retrospective, retrovirus
rhabd-[2] rod Greek ῥάβδος (rhábdos) Rhabdodon, rhabdoid, rhabdom, rhabdomancy, rhabdomyolysis, rhabdomyosarcoma
rhach-, rach- [3] spine Greek ῥάχις, ῥάχεως (rhákhis, rhákheōs) rachipagus, rachis, rachischisis, rhachiodont, rhachis
rhag-, rheg-[4] rend, tear Greek ῥηγνύναι (rhēgnúnai), ῥαγίζω, ῥῆξις (rhêxis), ῥῆγμα (rhêgma) bronchorrhagia, hemorrhage, menorrhagia, regma, rhagades, rhegma, rhegmatogenous, rhexis
rhe-[5] flow Greek ῥεῖν (rheîn), ῥυτός (rhutós), ῥύσις (rhúsis), ῥεῦμα (rheûma), ῥοία (rhoía), ῥυθμός (rhuthmós) antiarrhythmic, arrhythmia, arrhythmic, diarrhoea, dysrhythmia, endorheic, eurhythmia, eurhythmic, eurhythmy, gonorrhoea, hemorrhea, logorrhea, polyrhythm, rheology, rheometer, rheostat, rheum, rheumatic, rheumatism, rheumatoid, rheumatology, rhythm, rhythmic, rhyton
rhetin-[6] resin Greek ῥητίνη (rhētínē), ῥητινώδης, ῥητινόω retinite
rhig-[7] chill Greek ῥῖγος (rhîgos) rhigosaurus
rhin-[8] nose, snout Greek ῥίς, ῥινός (rhís, rhinós) catarrhine, haplorhine, platyrrhine, rhinoceros, rhinophyma, rhinoplasty, strepsirrhine
rhiz-[9] root Greek ῥίζα (rhíza), ῥιζοῦν (rhizoûn), ῥίζωμα (rhízōma) ectomycorrhiza, rhizoid, rhizomatous, rhizome, rhizomorph, rhizomorphous, rhizophagous, rhizophagy, Rhizopogon, Rhizopus, rhizosphere
rho-[10] R, r Greek Ρ, ρ, ῥῶ (rhô) rho, rhotacism, rhotacize, rhotic
rhod-[11] rose Greek ῥόδον (rhódon) rhododendron, rhodophyte, rhodopsin, rhodophobia
rhomb- spinning top Greek ῥόμβος (rhómbos) orthorhombic, rhomb, rhombic, rhomboid, rhombus, rhumb
rhynch-[12] snout Greek ῥύγχος (rhúnkhos) Oncorhynchus, Rhynchobatus, rhynchophore
rid-, ris- laugh Latin ridere "to laugh" (past participle risus) deride, derision, ridicule, ridiculous, risible
robor- oak, strength Latin rōborāre "to strengthen", from rōbur, rōbus "strength" corroborant, corroborate, corroboration, corroborative, corroborator, robust
rod-, ros- gnaw Latin rōdere, rōsus corrode, erosion, rodent
rog- ask Latin rogāre abrogate, arrogant, arrogate, derogate, derogation, derogatory, interrogation, prerogative, prorogue, rogation, rogue, surrogate
rostr- beak, prow Latin rōstrum brevirostrate, curvirostral, lamellirostral, rostellate, rostelliform, rostellum, rostral, rostrate, rostriform, rostrulum, rostrum
rot- wheel Latin rota, rotāre arrondissement, circumrotation, contrarotation, control, controller, decontrol, enroll, enrollee, enrollment, irrotational, multirole, multiroll, redondilla, reenroll, rodeo, role, roll, rondeau, rondel, rondelle, rondo, rotary, rotate, rotation, rotational, rotator, rotatory, rotavirus, rotelle, rotifer, Rotifera, rotiferous, rotiform, rotula, rotund, rotunda, rotundifolious, rotundity, roulette, round, roundel, roundelay, roundlet, rowel, semiround
ruber-, rubr- red Latin ruber erubescence, erubescent, rubella, Rubio, rubious, rubric, rubricate, rubrication, rubricator, ruby
rudi- unskilled, rough, unlearned Latin rudis erudite, erudition, rude, rudiment, rudimentary, rudity
rug- wrinkle Latin rūga, rugare corrugant, corrugate, corrugation, erugate, rugose
rumin- throat Latin rūmen, rūminis rumen, rumenic acid, ruminal, ruminant, ruminate, rumination, ruminator
rump-, rupt- break, burst Latin rumpere, ruptus abrupt, abruption, corrupt, corruptible, corruption, corruptor, disrupt, disruption, disruptive, disruptor, disrupture, erumpent, erupt, eruption, eruptive, incorrupt, incorruptibility, incorruptible, interrupt, interruptible, interruption, irrupt, irruption, irruptive, maleruption, noneruptive, reroute, rout, route, routine, rupture, subroutine, supereruption
rur- countryside, farm Latin rūs, rūris nonrural, roister, roisterous, rural, rustic, rusticate, rustication, rusticity


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