ringyoudaoicibaDictYouDict
ring: [OE] English has two distinct words ring. The one meaning ‘circle’ goes back to a prehistoric Germanic *khrenggaz, which also produced German, Dutch, Swedish, and Danish ring (not to mention the Finnish borrowing rengas). It may be related to Old Church Slavonic kragu ‘circle’. The Germanic form was taken over by Old French as ranc, from which English gets rank, and also as renc, which may be the source of English rink [18]. Ring ‘chime’ presumably goes back to a prehistoric Germanic ancestor that imitated the sound of clanging, and also produced German and Dutch ringen, Swedish ringa, and Danish ringe (the suggestion that it contains some reference to the circular motion of tolling bells is attractive, but has no basis in fact).
=> range, rank, rink
cycle (n.)youdaoicibaDictYouDict
late 14c., from Late Latin cyclus, from Greek kyklos "circle, wheel, any circular body, circular motion, cycle of events," from PIE kw(e)-kwl-o-, suffixed, reduplicated form of root *kwel- (1), also *kwele-, "to roll, to move around, wheel" (cognates: Sanskrit cakram "circle, wheel," carati "he moves, wanders;" Avestan caraiti "applies himself," c'axra "chariot, wagon;" Greek polos "a round axis" (PIE *kw- becomes Greek p- before some vowels), polein "move around;" Latin colere "to frequent, dwell in, to cultivate, move around," cultus "tended, cultivated," hence also "polished," colonus "husbandman, tenant farmer, settler, colonist;" Lithuanian kelias "a road, a way;" Old Norse hvel, Old English hweol "wheel;" Old Church Slavonic kolo, Old Russian kolo, Polish koło, Russian koleso "a wheel").
gyre (n.)youdaoicibaDictYouDict
1560s, "a circular motion," from Latin gyrus "circle, circular course, round, ring," from Greek gyros "a circle, ring," related to gyrós "rounded," perhaps from PIE root *geu- "to bend, curve" (cognates: Armenian kor "crooked," Lithuanian gurnas "hip, ankle, bone," Norwegian kaure "a curly lock of hair"). The noun is attested in Middle English only in reference to ship's tackle (early 15c.).
quarterstaff (n.)youdaoicibaDictYouDict
also quarter-staff, 1540s (quarter-stroke "stroke with a quarterstaff" is attested from early 15c.), stout pole, six to eight feet long (six-and-a-half sometimes is given as the standard length), tipped with iron, formerly a weapon used by the English peasantry. From staff (n.); the quarter is of uncertain signification. According to one theory, favored by fencing manuals, etc., it likely is in reference to operation of the weapon:
It was grasped by one hand in the middle, and by the other between the middle and the end. In the attack the latter hand shifted from one quarter of the staff to the other, giving the weapon a rapid circular motion, which brought the ends on the adversary at unexpected points. [Century Dictionary]
Linguists tend to prefer an explanation from woodcutting, perhaps a reference to a cut of lumber known as a quarter, but contemporary evidence is wanting for either conjecture.
twirl (n.)youdaoicibaDictYouDict
1590s, "rapid circular motion," from twirl (v.).