unknotn.

Brit.

/(ˌ)ʌnˈnɒt/, U.S.

/ˌənˈnɑt/

Origin: Formed within English, by derivation. Etymons: un- prefix¹, knot n.¹

Etymology: < un- prefix¹ + knot n.¹

Mathematics.

A closed curve that does not have a knot (knot n.¹ 9).The unknot is characterized by the fact that it can be continuously deformed to form a circle.

ΘΚΠ

the world > relative properties > number > geometry > curve > [noun] > other

quadratrix1656

section1665

family1705

semiparabola1728

tractrix1728

witcha1760

tractory1820

sinusoid1823

tractatrix1828

indicatrix1841

hodograph1847

tetrazomal1867

space curve1875

horograph1879

hypercycle1889

Peano curve1900

multiple arc1967

unknot1971

fractal1975

analemma1978

1971 P. M. Melvin Blowing Up & Down in 4-manifolds (Ph. D. diss., Univ. of Calif., Berkeley) vi. 58 S # S' and the unknot S₀ are 0-cobordant.

1995 Amer. Scientist Jan. 40 (caption) The smallest number of sign changes needed to turn a knot K into an unknot is its unknotting number.

2016 E. Flapan et al. Knots, Molecules, & Universe xii. 259 Changing any crossing in this projection of the trefoil will give us the unknot.

This entry has been updated (OED Third Edition, March 2018; most recently modified version published online March 2022).

unknotv.

Brit.

/(ˌ)ʌnˈnɒt/, U.S.

/ˌənˈnɑt/

Forms: see un- prefix² and knot v.

Origin: Formed within English, by derivation. Etymons: un- prefix², knot v.

Etymology: < un- prefix² + knot v.Compare Middle High German, German entknoten.

1. transitive. To untie or undo (a knot or something tied in a knot); also figurative (cf. knot n.¹ 10). Also: to remove a knot or knots from.

ΘΚΠ

the world > relative properties > wholeness > mutual relation of parts to whole > separation > separation or detachment > loosening or unfastening > loosen, unfasten, or untie [verb (transitive)] > untie

unknitOE

solvec1440

unfret1496

unknot1571

delace1581

untie1581

disbinda1638

unscure1749

1571 T. Fortescue tr. P. Mexia Foreste iv. iv. f. 171 Aristotle neuer hardned himself, plainly and appertly to vnknot [Fr. resoudre] this presente scruple.

1598 J. Florio Worlde of Wordes Sgroppare, to vntie, to vnknot.

1658 J. Evelyn tr. N. de Bonnefons French Gardiner 33 You shall also disburthen your trees that are too fertil, commencing with the smaller, by cutting the stalks in the middle without unknotting them.

1740 J. Sparrow tr. B. Saviard Observ. Surg. xxxiv. 79 When I had unknotted it my self, by drawing the Intestine in that Part, the natural Spring of it was so inverted, that it returned to its former Situation when I had quitted it.

1751 T. Crowley Life & Adventures of Mademoiselle de la Sarre iii. 46 My Opinion resolves a great many hard difficultys, whereas all the other Systems fail of success in unknotting them.

1866 A. Cary Ballads, Lyrics, & Hymns 54 I saw my Charley The..shawl from his neck Unknot, with a quick, wise cunning.

1891 Daily News 8 July 4/8 The man..who hoards string, unknotting it..from parcels.

1929 Sheboygan (Wisconsin) Press 30 Oct. 1/2 We would like to see the Conservation Commission..unknot the problem that has made the marsh a financial failure.

1994 Mass. Rev. 35 591 Gently..unknotting the ends of the hair.

2012 K. Smith Jammy Dodger 23 He was..struggling to unknot the laces of a pair of caramel brogues.

2. intransitive. Of a muscle or muscular part of the body: to relax, esp. after prolonged tension. Also transitive: to cause (a tense muscle or muscular part of the body) to relax. Cf. unknit v. 8a.

ΚΠ

1885 R. Jefferies Open Air 121 A strong sculler..his giant arms bare and the muscles..knotting and unknotting with the stroke.

1893 Homiletic Rev. 25 232/2 His muscles were too solidly knotted..to be easily unknotted and relaxed.

1943 W. Stegner Big Rock Candy Mountain v. 298 Chet drew a long breath, trying to un-knot his stomach.

1976 D. Koontz Night Chills (1983) i. i. 15 Suddenly his neck stopped aching and his shoulders unknotted.

2007 Financial Times Mag. 3 Mar. 42/4 She expertly unknots my shoulders and back.

This entry has been updated (OED Third Edition, March 2018; most recently modified version published online June 2022).

单词	unknot
释义	unknotn. Brit. /(ˌ)ʌnˈnɒt/, U.S. /ˌənˈnɑt/ Origin: Formed within English, by derivation. Etymons: un- prefix¹, knot n.¹ Etymology: < un- prefix¹ + knot n.¹ Mathematics. A closed curve that does not have a knot (knot n.¹ 9).The unknot is characterized by the fact that it can be continuously deformed to form a circle. ΘΚΠ the world > relative properties > number > geometry > curve > [noun] > other quadratrix1656 section1665 family1705 semiparabola1728 tractrix1728 witcha1760 tractory1820 sinusoid1823 tractatrix1828 indicatrix1841 hodograph1847 tetrazomal1867 space curve1875 horograph1879 hypercycle1889 Peano curve1900 multiple arc1967 unknot1971 fractal1975 analemma1978 1971 P. M. Melvin Blowing Up & Down in 4-manifolds (Ph. D. diss., Univ. of Calif., Berkeley) vi. 58 S # S' and the unknot S₀ are 0-cobordant. 1995 Amer. Scientist Jan. 40 (caption) The smallest number of sign changes needed to turn a knot K into an unknot is its unknotting number. 2016 E. Flapan et al. Knots, Molecules, & Universe xii. 259 Changing any crossing in this projection of the trefoil will give us the unknot. This entry has been updated (OED Third Edition, March 2018; most recently modified version published online March 2022). unknotv. Brit. /(ˌ)ʌnˈnɒt/, U.S. /ˌənˈnɑt/ Forms: see un- prefix² and knot v. Origin: Formed within English, by derivation. Etymons: un- prefix², knot v. Etymology: < un- prefix² + knot v.Compare Middle High German, German entknoten. 1. transitive. To untie or undo (a knot or something tied in a knot); also figurative (cf. knot n.¹ 10). Also: to remove a knot or knots from. ΘΚΠ the world > relative properties > wholeness > mutual relation of parts to whole > separation > separation or detachment > loosening or unfastening > loosen, unfasten, or untie [verb (transitive)] > untie unknitOE solvec1440 unfret1496 unknot1571 delace1581 untie1581 disbinda1638 unscure1749 1571 T. Fortescue tr. P. Mexia Foreste iv. iv. f. 171 Aristotle neuer hardned himself, plainly and appertly to vnknot [Fr. resoudre] this presente scruple. 1598 J. Florio Worlde of Wordes Sgroppare, to vntie, to vnknot. 1658 J. Evelyn tr. N. de Bonnefons French Gardiner 33 You shall also disburthen your trees that are too fertil, commencing with the smaller, by cutting the stalks in the middle without unknotting them. 1740 J. Sparrow tr. B. Saviard Observ. Surg. xxxiv. 79 When I had unknotted it my self, by drawing the Intestine in that Part, the natural Spring of it was so inverted, that it returned to its former Situation when I had quitted it. 1751 T. Crowley Life & Adventures of Mademoiselle de la Sarre iii. 46 My Opinion resolves a great many hard difficultys, whereas all the other Systems fail of success in unknotting them. 1866 A. Cary Ballads, Lyrics, & Hymns 54 I saw my Charley The..shawl from his neck Unknot, with a quick, wise cunning. 1891 Daily News 8 July 4/8 The man..who hoards string, unknotting it..from parcels. 1929 Sheboygan (Wisconsin) Press 30 Oct. 1/2 We would like to see the Conservation Commission..unknot the problem that has made the marsh a financial failure. 1994 Mass. Rev. 35 591 Gently..unknotting the ends of the hair. 2012 K. Smith Jammy Dodger 23 He was..struggling to unknot the laces of a pair of caramel brogues. 2. intransitive. Of a muscle or muscular part of the body: to relax, esp. after prolonged tension. Also transitive: to cause (a tense muscle or muscular part of the body) to relax. Cf. unknit v. 8a. ΚΠ 1885 R. Jefferies Open Air 121 A strong sculler..his giant arms bare and the muscles..knotting and unknotting with the stroke. 1893 Homiletic Rev. 25 232/2 His muscles were too solidly knotted..to be easily unknotted and relaxed. 1943 W. Stegner Big Rock Candy Mountain v. 298 Chet drew a long breath, trying to un-knot his stomach. 1976 D. Koontz Night Chills (1983) i. i. 15 Suddenly his neck stopped aching and his shoulders unknotted. 2007 Financial Times Mag. 3 Mar. 42/4 She expertly unknots my shoulders and back. This entry has been updated (OED Third Edition, March 2018; most recently modified version published online June 2022). < n.1971v.1571
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