Word forms: (present) jackknifes, (past) jackknifed, (perfect) jackknifed, (progressive) jackknifing
verbRelated wordsThe following words are also problematic things that a vehicle may do:backfireskidstall ( Automotive engineering : Design and performance )
If a truck that is in two parts jackknifes, the back part swings around at a sharp angle to the front part in an uncontrolled
way as the truck is moving.
A truck pulling a camper jackknifed and brought traffic to a standstill.
The tractor-trailer jackknifed across both lanes of the icy highway.
Delays were caused by a semitrailer which had jackknifed and shed its load.
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