Jackknife: meaning, definitions and examples

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.

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.

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