jackknifedadj.

Brit.

/ˈdʒaknʌɪft/, U.S.

/ˈdʒækˌnaɪft/

Forms: see jackknife v. and -ed suffix¹.

Origin: Formed within English, by derivation. Etymons: jackknife v., -ed suffix¹.

Etymology: < jackknife v. + -ed suffix¹.

1. Cut, inscribed, etc., using a jackknife; covered with cuts or holes made using a jackknife. Now rare.Also (and in earliest use) in well-jackknifed.

ΚΠ

1853 N. P. Willis Health Trip to Tropics xxxiv. 319 I had taken refuge among the whittled autobiographies on the inside of the wooden cupola—a well jack-knifed list of fellow citizens impatient to be read of.

1855 W. Boyd Oakwood Old (single sheet) The stage-Yankee's method of recording things, in jackknifed notches on a softwood stick.

1889 Amer. Ann. Deaf Oct. 277 Desks ink-stained and jack-knifed like those of a country school.

1940 Vineland Hist. Mag. Oct. 114 The desk part, with the shelf under the well-jack-knifed-top, being used by the pupil sitting on the seat next behind.

a. Of a person or (a part of) the body, etc.: that is in a bent or doubled-up position.

ΚΠ

1940 W. Cherry in Marquette (Mich.) Inmate Feb. 29/2 He placed a hand on my jack-knifed knee.

1949 H. E. Hurd Yankee Boundaries 37 He squeezed between the halves, using his back And jackknifed leg for leverage.

1973 N. Freedman Joshua 201 Bitterbaum was pressed in on himself, his long frame jack-knifed.

1994 J. Birmingham He died with Felafel in his Hand (1997) vi. 127 She'd be in there thrashing around under the sheets, and poor old Wayne would be jack-knifed on the two seater lounge outside.

2017 Daily Tel. (Nexis) 21 June (Sport section) 9 An old-school physio is hovering around his jackknifed body with a big plastic bottle of water.

b. Of an articulated lorry, train, etc.: folded in on itself at one of the couplings; (of a towed wagon, trailer, etc.) forming an acute angle with an adjoining section; see jackknife v. 3a.

ΚΠ

1948 Pop. Mech. Apr. 110/1 The 20-ton wrecker..is capable of lifting or moving loaded trucks, streetcars and jackknifed trailers.

1967 Commerc. Motor 10 Feb. 104 (advt.) With the foot-brake applied the jack-knifed trailer can be steered back into line with the tractor.

1981 H. Harrison Wheelworld ix. 96 As this was being done the tanks had carefully straightened out the jackknifed train and all of the couplings were examined carefully for damage.

2017 Press (Christchurch, N.Z.) (Nexis) 24 Aug. 6 A jackknifed truck closed the Rakaia River bridge..for several hours.

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

单词	jackknifed
释义	jackknifedadj. Brit. /ˈdʒaknʌɪft/, U.S. /ˈdʒækˌnaɪft/ Forms: see jackknife v. and -ed suffix¹. Origin: Formed within English, by derivation. Etymons: jackknife v., -ed suffix¹. Etymology: < jackknife v. + -ed suffix¹. 1. Cut, inscribed, etc., using a jackknife; covered with cuts or holes made using a jackknife. Now rare.Also (and in earliest use) in well-jackknifed. ΚΠ 1853 N. P. Willis Health Trip to Tropics xxxiv. 319 I had taken refuge among the whittled autobiographies on the inside of the wooden cupola—a well jack-knifed list of fellow citizens impatient to be read of. 1855 W. Boyd Oakwood Old (single sheet) The stage-Yankee's method of recording things, in jackknifed notches on a softwood stick. 1889 Amer. Ann. Deaf Oct. 277 Desks ink-stained and jack-knifed like those of a country school. 1940 Vineland Hist. Mag. Oct. 114 The desk part, with the shelf under the well-jack-knifed-top, being used by the pupil sitting on the seat next behind. 2. a. Of a person or (a part of) the body, etc.: that is in a bent or doubled-up position. ΚΠ 1940 W. Cherry in Marquette (Mich.) Inmate Feb. 29/2 He placed a hand on my jack-knifed knee. 1949 H. E. Hurd Yankee Boundaries 37 He squeezed between the halves, using his back And jackknifed leg for leverage. 1973 N. Freedman Joshua 201 Bitterbaum was pressed in on himself, his long frame jack-knifed. 1994 J. Birmingham He died with Felafel in his Hand (1997) vi. 127 She'd be in there thrashing around under the sheets, and poor old Wayne would be jack-knifed on the two seater lounge outside. 2017 Daily Tel. (Nexis) 21 June (Sport section) 9 An old-school physio is hovering around his jackknifed body with a big plastic bottle of water. b. Of an articulated lorry, train, etc.: folded in on itself at one of the couplings; (of a towed wagon, trailer, etc.) forming an acute angle with an adjoining section; see jackknife v. 3a. ΚΠ 1948 Pop. Mech. Apr. 110/1 The 20-ton wrecker..is capable of lifting or moving loaded trucks, streetcars and jackknifed trailers. 1967 Commerc. Motor 10 Feb. 104 (advt.) With the foot-brake applied the jack-knifed trailer can be steered back into line with the tractor. 1981 H. Harrison Wheelworld ix. 96 As this was being done the tanks had carefully straightened out the jackknifed train and all of the couplings were examined carefully for damage. 2017 Press (Christchurch, N.Z.) (Nexis) 24 Aug. 6 A jackknifed truck closed the Rakaia River bridge..for several hours. This entry has been updated (OED Third Edition, March 2018; most recently modified version published online March 2022). < adj.1853
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