List of Greek and Latin roots in English/R

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

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R

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)	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, 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)	strepsirrhine
rhiz-^[9]	root	Greek	ῥίζα (rhíza), ῥιζοῦν (rhizoûn), ῥίζωμα (rhízōma)	rhizophagous, rhizophagy, Rhizopogon, Rhizopus, rhizosphere
rho-^[10]	R, r	Greek	Ρ, ρ, ῥῶ (rhô)	rhotacism , rhotacize, rhotic
rhod-^[11]	rose	Greek	ῥόδον (rhódon)	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-	prow	Latin	rōstrum	brevirostrate, curvirostral, lamellirostral, rostellate, rostelliform, rostellum, rostral, rostrate, rostriform, rostrulum, rostrum
rot-	wheel	Latin	rota, rotāre	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, supereruption
rur-	countryside, farm	Latin	rūs, rūris	nonrural, roister, roisterous, rural, rustic, rusticate, rustication, rusticity

References

[1] ῥάπτω in Liddell and Scott

[2] ῥάβδος in Liddell and Scott

[3] ῥάχις in Liddell and Scott

[4] ῥήγνυμι in Liddell and Scott

[5] ῥέω in Liddell and Scott

[6] ῥητίνη in Liddell and Scott

[7] ῥῖγος in Liddell and Scott

[8] ῥίς in Liddell and Scott

[9] ῥίζα in Liddell and Scott

[10] ῥῶ in Liddell and Scott

[11] ῥόδον in Liddell and Scott

[12] ῥύγχος in Liddell and Scott

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