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jackknife Synonyms
Another word for jackknife
Choosing another word for jackknife depends on context, so the synonyms and similar words below are separated across 3 exact definitions and ranked by match strength.
• noun (Context 1)
A large pocketknife with a blade or blades that fold into the handle.
Usage Example
"The camper used a sturdy pocketknife to whittle kindling for the evening fire."
Strongest
pocketknife
clasp knife
Strong
penknife
• verb (Context 2)
To fold or bend at an acute angle like the blade of a folding knife (especially of an articulated vehicle whose trailer swings around toward the cab during a skid).
Usage Example
"The tractor-trailer jackknifed on the icy highway, blocking two lanes of traffic."
Strong
double up
buckle
fold
• noun (Context 3)
A dive in which the diver bends in midair to touch the toes with the hands while keeping the legs straight, then straightens the body before entering the water headfirst.
Usage Example
"She executed a graceful pike dive from the three-meter springboard."
Strongest
pike dive
Opposites of jackknife
The opposite of jackknife shifts depending on context. Common opposites include:
straighten
• Nearby Words
Cite this Entry
Wordmom. (2026). Synonyms for Jackknife. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/jackknife