Synonyms and Antonyms for jackknife

1. jackknife (v.)

dive into the water bending the body at the waist at a right angle, like a jackknife

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2. jackknife (n.)

a dive in which the diver bends to touch the ankles before straightening out

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3. jackknife (n.)

a large knife with one or more folding blades

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4. jackknife-fish (n.)

black-and-white drumfish with an erect elongated dorsal fin

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