righteousness (n.)youdaoicibaDictYouDict[righteousness 词源字典]
Old English rehtwisnisse; see righteous + -ness.[righteousness etymology, righteousness origin, 英语词源]
rightful (adj.)youdaoicibaDictYouDict
Old English rihtful; see right (adj.1) + -ful. Related: Rightfully; rightfulness.
rightly (adv.)youdaoicibaDictYouDict
Old English rihtlice "justly, virtuously; properly, regularly, correctly;" see right (adj.1) + -ly (2).
righty (n.)youdaoicibaDictYouDict
"right-handed person," 1949, from right (adj.2) + -y (3).
rigid (adj.)youdaoicibaDictYouDict
early 15c., from Latin rigidus "hard, stiff, rough, severe," from rigere "be stiff," from PIE *reig- "stretch (tight), bind tightly, make fast" (cognates: Old Irish riag "torture," Middle High German ric "band, string"). Related: Rigidly.
rigidity (n.)youdaoicibaDictYouDict
1620s, from Latin rigiditas "stiffness," from rigidus (see rigid).
rigmarole (n.)youdaoicibaDictYouDict
1736, "a long, rambling discourse," apparently from an altered, Kentish colloquial survival of ragman roll "long list or catalogue" (1520s), in Middle English a long roll of verses descriptive of personal characters, used in a medieval game of chance called Rageman, perhaps from Anglo-French Ragemon le bon "Ragemon the good," which was the heading on one set of the verses, referring to a character by that name. Sense transferred to "foolish activity or commotion" by 1939.
rigor (n.)youdaoicibaDictYouDict
late 14c., from Old French rigor "strength, hardness" (13c., Modern French rigueur), from Latin rigorem (nominative rigor) "numbness, stiffness, hardness, firmness; roughness, rudeness," from rigere "be stiff" (see rigid).
rigor mortisyoudaoicibaDictYouDict
"stiffening of the body caused by contraction of muscles after death," 1837, from Latin rigor "stiffness" (see rigor) + mortis, genitive of mors "death" (see mortal).
rigorous (adj.)youdaoicibaDictYouDict
late 14c., from Old French rigorous (13c., Modern French rigoureux), from Medieval Latin rigorosus, from Latin rigor (see rigor). Related: Rigorously.
rigour (n.)youdaoicibaDictYouDict
chiefly British English spelling of rigor (q.v.); for spelling, see -or.
rile (v.)youdaoicibaDictYouDict
1825, American English spelling alteration to reflect a dialectal pronunciation of roil (q.v.); compare heist from hoist and in the same era spile for spoil (v.). Bartlett writes that in both England and America roil "is now commonly pronounced and written rile" ["Dictionary of Americanisms," 1848]. Related: Riled; riling.
rill (n.)youdaoicibaDictYouDict
"small brook, rivulet," 1530s, from or related to Dutch and Frisian ril, Low German rille "groove, furrow, running stream," probably from Proto-Germanic *ril- (cognates: Old English rið, riþe "brook, stream," which survives only in dialects), a diminutive form from PIE root *reie- "to run, flow" (see Rhine).
rim (n.)youdaoicibaDictYouDict
Old English rima "edge, border, verge, coast," as in særima "seashore," literally "rim of the sea," and dægrima "dawn," literally "rim of the day." Related to Old Norse rime, rimi "a raised strip of land, ridge," Old Frisian rim "edge," but with no other known cognates. The snare drummer's rim shot (striking the rim and the head at once) is recorded from 1934.
rim (v.)youdaoicibaDictYouDict
1794, "to fit with a rim," from rim (n.). Sexual senses from 1920s, some perhaps influenced by ream (v.). Related: Rimmed; rimming.
rime (n.)youdaoicibaDictYouDict
"hoarfrost," Old English hrim, from Proto-Germanic *khrima- (cognates: Old Norse hrim, Dutch rijm, German Reif). Old French rime is of Germanic origin. Rare in Middle English, surviving mainly in Scottish and northern English, revived in literary use late 18c.
rind (n.)youdaoicibaDictYouDict
Old English rinde "bark, crust," later "peel of a fruit or vegetable" (c. 1400), from Proto-Germanic *rind- (cognates: Old Saxon rinda, Middle Dutch and Dutch rinde "bark of a tree," Old High German rinda, German Rinde), probably related to Old English rendan (see rend (v.)).
ring (n.1)youdaoicibaDictYouDict
"circular band," Old English hring "small circlet, especially one of metal for wearing on the finger or as part of a mail coat; anything circular," from Proto-Germanic *hringaz "something curved, circle" (cognates: Old Norse hringr, Old Frisian hring, Danish, Swedish, Dutch ring, Old High German hring, German Ring), from PIE *(s)kregh- nasalized form of (s)kregh-, from root *(s)ker- (3) "to turn, bend," with wide-ranging derivative senses (cognates: Latin curvus "bent, curved," crispus "curly;" Old Church Slavonic kragu "circle," and perhaps Greek kirkos "ring," koronos "curved").

Other Old English senses were "circular group of persons," also "horizon." Meaning "place for prize fight and wrestling bouts" (early 14c.) is from the space in a circle of bystanders in the midst of which such contests once were held, "... a circle formed for boxers, wrestlers, and cudgel players, by a man styled Vinegar; who, with his hat before his eyes, goes round the circle, striking at random with his whip to prevent the populace from crowding in" [Grose, 1785]. Meaning "combination of interested persons" is from 1829. Of trees, from 1670s; fairy ring is from 1620s. Ring finger is Old English hringfingr, a compound found in other Germanic languages. To run rings round (someone) "be superior to" is from 1891.

Nursery rhyme ring a ring a rosie is attested in an American form (with a different ending) from c. 1790. "The belief that the rhyme originated with the Great Plague is now almost universal, but has no evidence to support it and is almost certainly nonsense" ["Oxford Dictionary of English Folklore"]. This proposal of connection dates only to the late 1960s.
ring (v.1)youdaoicibaDictYouDict
"sound a bell," Old English hringan "sound, give a certain resonant sound when struck; announce by bells," from Proto-Germanic *khrengan (cognates: Old Norse hringja, Swedish ringa, Middle Dutch ringen), probably of imitative origin. Related: Rang; rung. Originally a weak verb, strong inflection began in early Middle English by influence of sing, etc. To ring down a theatrical curtain is from 1772, from the custom of signaling for it by ringing a bell. To ring up a purchase on a cash register is by 1937, from the bell that sounded. Specialized sense "give a resonant sound when struck as an indication of genuineness or purity," with transferred use (as in to ring hollow) is from 1610s.
ring (v.2)youdaoicibaDictYouDict
"make a circle around," Old English ymbhringan, from the root of ring (n.1). Intransitive sense "gather in a ring" is mid-15c. Sense of "provide or attach a ring" is late 14c. Meaning "move in a circle around" is from 1825. Related: Ringed; ringing. Compare Frisian ringje, Middle Dutch and Dutch ringen, Old High German ringan, German ringen, Old Norse hringa, hringja.