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3. jackknife
noun. a dive in which the diver bends to touch the ankles before straightening out.
Synonyms
Antonyms
4. jackknife
verb. dive into the water bending the body at the waist at a right angle, like a jackknife.
Sentences with jackknife
1. Verb, base form
Avoid exaggerated turns, which can cause your trailer and vehicle to buckle or jackknife, necessitating another attempt.
2. Noun, singular or mass
For a jackknife, hold one knee to the chest and lean backwards for a directed splash.
3. Adjective
To tighten your tummy and strengthen your core, Bodybuilding.com recommends butt-ups, crunches, bent-knee hip raises, jackknife sit-ups and the cross-body crunch, which is similar to an air bike.
4. Adjective, comparative
Try incline situps on an incline bench or do jackknife situps from the floor.
