Jackknife often relates to outdoor activities or handy tasks for convenience.

Tool Usage

A jackknife is small, foldable, and easily carried, emphasizing portability.

Portable Item

In sports, 'jackknife' describes precise, controlled body movement.

A jackknife dive is admired for its visual elegance in diving competitions.

In transport, 'jackknife' implies a loss of control and potential danger.

Mentioning a jackknifed truck often suggests a traffic accident or road incident.