randomize (v.)youdaoicibaDictYouDict[randomize 词源字典]
1926, from random (adj.) + -ize. Related: Randomized; randomizing.[randomize etymology, randomize origin, 英语词源]
randy (adj.)youdaoicibaDictYouDict
1690s, Scottish, "aggressive, boisterous," probably from rand "to rave," an obsolete variant of rant (v.). In the original sense especially of beggars, "and probably implying vagrant habits as well as rude behavior" [OED]. Sense of "lewd, lustful" first recorded 1847. Related: Randiness.
rang (v.)youdaoicibaDictYouDict
past tense of ring (v.1). Middle English, by analogy of sang/sing, etc.
range (v.)youdaoicibaDictYouDict
c. 1200, rengen, "move over a large area, roam with the purpose of searching or hunting," from Old French ranger, earlier rengier "to place in a row, arrange; get into line," from reng "row, line," from a Germanic source (see rank (n.)). Sense of "to arrange in rows" is recorded from c. 1300; intransitive sense of "exist in a row or rows" is from c. 1600. Related: Ranged; ranging.
range (n.)youdaoicibaDictYouDict
c. 1200, "row or line of persons" (especially hunters or soldiers), from Old French range "range, rank" (see range (v.)). General sense of "line, row" is from early 14c.; meaning "row of mountains" is from 1705.

Meaning "scope, extent" first recorded late 15c.; that of "area over which animals seek food" is from 1620s, from the verb. Specific U.S. sense of "series of townships six miles in width" is from 1785. Sense of "distance a gun can send a bullet" is recorded from 1590s; meaning "place used for shooting practice" is from 1862. The cooking appliance so called since mid-15c., for unknown reasons. Originally a stove built into a fireplace with openings on top for multiple operations. Range-finder attested from 1872.
ranger (n.)youdaoicibaDictYouDict
late 14c., "gamekeeper," agent noun from range (v.)). Attested from 1660s in sense of "man (often mounted) who polices an area." The elite U.S. combat unit is attested from 1942 (organized 1941).
rangy (adj.)youdaoicibaDictYouDict
"having a long, slender form" (as an animal suited to ranging), 1845, from range (v.) + -y (2). Also "adapted for ranging" (1868). Of landscapes, "hilly," 1862, Australian English. Related: Ranginess.
As a rule, we hold that the Jersey should be "growthy," deep-flanked, and loose-jointed, and should have, generally, the characteristics which farmers know as "rangy." ["American Agriculturalist," November 1876]
rank (v.)youdaoicibaDictYouDict
1570s, "arrange in lines;" 1590s, "put in order, classify; assign a rank to," from rank (n.). Related: Ranked; ranking.
rank (n.)youdaoicibaDictYouDict
early 14c., "row, line series;" c. 1400, a row of an army, from Old French renc, ranc "row, line" (Modern French rang), from Frankish *hring or some other Germanic source (compare Old High German hring "circle, ring"), from Proto-Germanic *hringaz "circle, ring, something curved" (see ring (n.1)).

Meaning "a social division, class of persons" is from early 15c. Meaning "high station in society" is from early 15c. Meaning "a relative position" is from c. 1600.
rank (adj.)youdaoicibaDictYouDict
Old English ranc "proud, overbearing, showy," from Proto-Germanic *rankaz (cognates: Danish rank "right, upright," German rank "slender," Old Norse rakkr "straight, erect"), perhaps from PIE *reg- "to stretch, straighten" (see right (adj.)). In reference to plant growth, "vigorous, luxuriant, abundant, copious" it is recorded from c. 1300. Related: Rankly; rankness.

Sense evolved in Middle English to "large and coarse" (c. 1300), then, via notion of "excessive and unpleasant," to "corrupt, loathsome, foul" (mid-14c.), perhaps from influence of Middle French rance "rancid." In 17c. also "lewd, lustful."

Much used 16c. as a pejorative intensive (as in rank folly). This is possibly the source of the verb meaning "to reveal another's guilt" (1929, underworld slang), and that of "to harass, abuse," 1934, U.S. black dialect, though this also may be from the role of the activity in establishing social hierarchy (from rank (n.)).
rank and file (n.)youdaoicibaDictYouDict
1590s, in reference to the horizontal and vertical lines of soldiers marching in formation; thence generalized to "common soldiers" (1796) and "common people, general body" of any group (1860).
rankle (v.)youdaoicibaDictYouDict
c. 1300, "to fester," from Old French rancler, earlier raoncler, draoncler "to suppurate, run," from draoncle "abscess, festering sore," from Medieval Latin dracunculus, literally "little dragon," diminutive of Latin draco "serpent, dragon" (see dragon). The notion is of an ulcer caused by a snake's bite. Meaning "cause to fester" is from c. 1400. Related: Rankled; rankling.
ransack (v.)youdaoicibaDictYouDict
mid-13c., from a Scandinavian source akin to Old Norse rannsaka "to pillage," literally "search the house" (especially legally, for stolen goods), from rann "house," from Proto-Germanic *raznan (c.f. Gothic razn, Old English ærn "house;" see barn) + saka "to search," related to Old Norse soekja "seek" (see seek). Sense influenced by sack (v.). Related: Ransacked; ransacking.
ransom (n.)youdaoicibaDictYouDict
c. 1200, "sum paid for the release of a prisoner or captured man," from Old French ranson (Modern French rançon), earlier raenson "ransom, redemption," from Latin redemptionem (nominative redemptio) "a redeeming," from redimere (see redeem).
ransomyoudaoicibaDictYouDict
early 14c., from ransom (n.). Related: Ransomed; ransoming.
rant (v.)youdaoicibaDictYouDict
c. 1600, "to be jovial and boisterous," also "to talk bombastically," from Dutch randten (earlier ranten) "talk foolishly, rave," of unknown origin (compare German rantzen "to frolic, spring about"). Related: Ranted; ranting. Ranters "antinomian sect which arose in England c. 1645" is attested from 1651; applied 1823 to early Methodists. A 1700 slang dictionary has rantipole "a rude wild Boy or Girl" (also as a verb and adjective); to ride rantipole meant "The woman uppermost in the amorous congress" [Grose].
rant (n.)youdaoicibaDictYouDict
"boisterous, empty declamation; fierce or high-sounding language without much meaning or dignity of thought; bombast; a ranting speech," 1640s, from rant (v.).
rantallion (n.)youdaoicibaDictYouDict
"One whose scrotum is so relaxed as to be longer than his penis, i. e. whose shot pouch is longer than the barrel of his piece." ["Dictionary of the Vulgar Tongue," Grose, 1785]
rap (n.)youdaoicibaDictYouDict
c. 1300, "a quick, light blow, stroke," also "a fart" (late 15c.), native or borrowed from a Scandinavian source (compare Danish rap, Swedish rapp "light blow"); either way probably of imitative origin (compare slap, clap).

Slang meaning "rebuke, blame, responsibility" is from 1777; specific meaning "criminal indictment" (as in rap sheet, 1960) is from 1903. To beat the rap is from 1927. Meaning "music with improvised words" first in New York City slang, 1979 (see rap (v.2)).
rap (v.1)youdaoicibaDictYouDict
mid-14c., "strike, smite, knock," from rap (n.). Related: Rapped; rapping. To rap (someone's) knuckles "give light punishment" is from 1749. Related: Rapped; rapping.