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to jackknife

to jackknife

3 8.0
To bend suddenly so a truck and its trailer form a V shape
  • verb
  • /ˈdʒæknaɪf/
  • Specialized
translation icon : hacer tijera
  • When the truck hit the brakes suddenly, it jackknifed and slid off the road.
  • truck jackknifed
  • tractor-trailer jackknifed
  • trailer jackknifed

Examples

  • We've got a jackknifed tractor-trailer at Route 22 in Devonshire.

  • ...has jackknifed on the Williamsburg Bridge a few minutes ago.

  • Got a jackknifed truck up on Route 5.

  • After his truck jackknifed off a country road, he sustained severe brain damage.

    Academic text (2009)
  • Tractor jackknifed about five mile up.

  • One of those manure spreaders jackknifed on the Santa Ana.

  • I've already spoken with some of the people who were on the bridge when the tanker jackknifed.

  • In the midst of the accident, the tanker had jackknifed across both lanes of the road and completely blocked traffic in both directions.

    Fiction book (2001)
  • The interstate was shut down overnight from Morgantown to the Maryland line after five tractor-trailers jackknifed.

    Blog text (20)
  • We've got a jackknifed produce truck on the westbound side of the 10 spreading tomatoes all over the roadway.

Antonyms

To make something free of bends, twists, or knots

Compounds

A sea clam with a long narrow shell that lives in sand

A black and white sea fish with a long fin on its back

How Bent

to jackknife
  • Specialized
3 8.0
to fold
220 1.0
to bend
268 1.0

Surface Forms

jackknife infinitive
jackknifed past
jackknifed past participle
jackknifing present participle
jackknifes third person singular

Etymology

Jackknife (to fold sharply) also comes from the folding knife idea: when a truck and trailer fold together into a V-shape it looks like a pocket knife closing, so drivers say the vehicle has 'jackknifed'.