(also jackknife)Word forms: 3rd person singular present tense jack-knifes, present participle jack-knifing, past tense, past participle jack-knifed
VERB （铰接卡车失控时）弯成V字形，弯折 If a truck that is in two parts jack-knifes, the back part swings around at a sharp angle to the front part in an uncontrolled way as the truck is moving. （铰接卡车失控时）弯成V字形，弯折
His vehicle jack-knifed, and crashed across all three lanes of the opposite carriageway. [VERB]