词根词缀：radic-, radi-

【来源及含义】Latin: root

【同源单词】deracinate, deracination, eradicable, eradicate, eradication, fila radicularia nervorum spinalium

词根词缀：radiculo-, radicul-

【来源及含义】Latin: "little root"; pertaining to nerve roots

【同源单词】fila radicularia nervorum spinalium, myeloradiculodysplasia, polyradiculopathy, radicula, radiculalgia, radicular

词根词缀：radio-, radi-, rad-

【来源及含义】Latin: ray, radiating [the Latin word for the spokes of a wheel is radius]; spoke, staff, rod

【同源单词】involuntary euthanasia, irradiance, irradiant, irradiate, radial, radian

词根词缀：rami-, ram-

【来源及含义】Latin: branch, branches, or a forked structure; ramus (singular), rami (plural); a general term for a smaller structure given off by a larger one, or into which the larger structure; such as, a blood vessel or nerve, divides

【同源单词】anterior ramus, axiramificate, bronchial ramus, mandibular ramus, meningeal ramus, posterior ramus

词根词缀：rancid-

【来源及含义】Latin: stinking, offensive; spoiled, rotten; foul smelling, disgusting

【同源单词】rancid, rancidification, rancidify, rancidity, rancidly, rancidness

词根词缀：rani-, ran-

【来源及含义】Latin: frog or frogs

【同源单词】frog, rana, ranaphilia, ranarian, ranarium, ranid

词根词缀：rap-, rav-

【来源及含义】Latin: tearing away, seizing, swift, rapid; snatch away, seize, carry off; from Latin rapere, "to seize by force and to carry off"

【同源单词】correption, enrapt, enrapture, enraptured, fluviraption, nonusurping

词根词缀：rar-, rare-

【来源及含义】Latin: rarus, rare, thin, loose, sparse; airy, porous, infrequent, unusual

【同源单词】bone rarefaction, rare, rare species, rare, rare-earth alloy, rare-earth elements

词根词缀：ratio-, reason-

【来源及含义】Latin: reckoning, to reckon; calculating, calculation; understanding; thinking

【同源单词】arraign, arraigner, arraignment, derationalize, irrational, irrationalism

词根词缀：rauc-

【来源及含义】Latin: "hoarse"; hoarse cries; howl, roar; rough-sounding, harsh; loud, rough

【同源单词】raucity, raucous, raucously, raucousness