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Jackknife: meaning, definitions and examples

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jackknife

 

[ ˈdʒæknaɪf ]

Noun
Context #1 | Noun

tool, knife

A jackknife is a folding knife with a blade that folds into the handle. It is commonly used for various tasks such as camping, fishing, and outdoor activities. The design allows for easy portability and safe storage when not in use.

Synonyms

folding knife, multi-tool, pocketknife

Examples of usage

  • He used his jackknife to carve a small figure.
  • I always carry a jackknife while hiking.
  • A jackknife is useful for cutting rope.
Context #2 | Noun

automotive, maneuver

In automotive contexts, a jackknife refers to a situation where a trailer being towed swings out of control, resulting in a sharp bend that resembles the shape of a jackknife. This can occur due to sudden braking or sharp turns and poses a significant safety risk.

Synonyms

skid, spin-out, sway

Examples of usage

  • The truck experienced a jackknife when it lost traction on the icy road.
  • He narrowly avoided a jackknife incident while towing the trailer.
  • Drivers should be cautious to prevent a jackknife accident.

Translations

Translations of the word "jackknife" in other languages:

🇵🇹 canivete

🇮🇳 जैकनाइफ

🇩🇪 Klappmesser

🇮🇩 pisau lipat

🇺🇦 складний ніж

🇵🇱 nóż składany

🇯🇵 ジャックナイフ

🇫🇷 couteau pliant

🇪🇸 cuchillo plegable

🇹🇷 katlanabilir bıçak

🇰🇷 접이식 칼

🇸🇦 سكين مطوية

🇨🇿 skládací nůž

🇸🇰 skládací nôž

🇨🇳 折叠刀

🇸🇮 zložljiv nož

🇮🇸 faldanótt

🇰🇿 қалта пышағы

🇬🇪 საკეცი დანები

🇦🇿 bükülən bıçaq

🇲🇽 cuchillo plegable

Etymology

The term 'jackknife' originates from the late 18th century, derived from the combination of the words 'jack,' likely referring to a generic man or worker, and 'knife,' indicating a cutting tool. Early references to jackknives often described them as tools carried by sailors and laborers. The folding design allowed for easy use and safety in the days when knives were commonly carried. The term expanded into maritime language before being adopted into colloquial vocabulary to describe various types of knives. By the 20th century, it had also taken on a new meaning in the automotive world, where it described the dangerous maneuver involving trailers. This dual meaning demonstrates the evolution of language influenced by practicality and usage in various professions.

Word Frequency Rank

This word's position of #33,370 indicates it's among the more rare English words. While understanding it broadens your vocabulary, focus on more common words first.