Greek and Latin roots in English_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	ranaR	Rana
ranc-	rancidness, grudge, bitterness	Latin	rancere	rancid, rancor
rap-	rob, seize	Latin	rapere "to seize, rob"	rape, rapacity, raptor, surreptitious
rap-	turnip	Latin	rapum	rapeseed
raph-	seam	Greek	ῤαφή (rhaphē)	raphe, raphae
rar-	rare	Latin	rarus	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)	anorexia, regal, regicide, rex, royal
regul-	rule	Latin	regula "to rule"	regular, regulate, regulation, rule
rem-	oar	Latin	remus	bireme, trireme
ren-	kidney	Latin	renes	renal
reneg-	deny	Latin	renegare	renegade, renege
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)	rhinoceros, 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 "to laugh" (past participle risus)	deride, derision, ridicule, ridiculous, risible
robor-	oak, strength	Latin	roborare "to strengthen", from robur, robus "strength"	corroborate, corroboration, robust
rod-, ros-	gnaw	Latin	rodere, rosus	corrode, erosion, rodent
rog-	ask	Latin	rogare	abrogate, arrogant, arrogate, derogatory, interrogation, prerogative, prorogue, rogation, rogue, surrogate
rostr-	beak, prow	Latin	rostrum	rostral, rostriform, rostrum
rot-	wheel	Latin	rota, rotare	rotation, rotunda
ruber-, rubr-	red	Latin	ruber	rubric, ruby
rudi-	unskilled, rough, unlearned	Latin	rudis	erudite, erudition, rude, rudimentary
rug-	wrinkle	Latin	ruga, rugare	corrugation
rumin-	throat	Latin	rumen, ruminis	rumination
rump-, rupt-	break	Latin	rumpere, ruptus	abrupt, corruptible, disrupt, erupt, eruption, interrupt, rupture
rur-	country	Latin	rus, ruris	rural