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jackknife

noun
🔊/ˈdʒæknaɪf/
🔊/ˈdʒæknaɪf/
(plural jackknives
🔊/ˈdʒæknaɪvz/
🔊/ˈdʒæknaɪvz/
)
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  1. a large knife with a blade (= cutting edge) that folds into the handle
大折刀

jackknife

verb
🔊/ˈdʒæknaɪf/
🔊/ˈdʒæknaɪf/
 [intransitive]
Verb Forms
present simple I / you / we / they jackknife
🔊/ˈdʒæknaɪf/
🔊/ˈdʒæknaɪf/
he / she / it jackknifes
🔊/ˈdʒæknaɪfs/
🔊/ˈdʒæknaɪfs/
past simple jackknifed
🔊/ˈdʒæknaɪft/
🔊/ˈdʒæknaɪft/
past participle jackknifed
🔊/ˈdʒæknaɪft/
🔊/ˈdʒæknaɪft/
-ing form jackknifing
🔊/ˈdʒæknaɪfɪŋ/
🔊/ˈdʒæknaɪfɪŋ/
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  1. to form a V-shape. For example if a lorry that is in two parts jackknifes, the driver loses control and the back part moves towards the front part.弯成 V 字形（如铰接货车失控时的弯折）Topics Transport by car or lorryc2
    Oxford Collocations DictionaryJackknife is used with these nouns as the subject:
    • lorry
    See full entry