jackknife

• Существительное, обозначающее большой складной нож с одним или несколькими лезвиями, или тип прыжка в воду, при котором ныряльщик сгибается в поясе, чтобы коснуться лодыжек, а затем выпрямляется.

A noun referring to a large folding knife with one or more blades, or a type of dive where the diver bends at the waist to touch their ankles before straightening out.

нестандартное множественное число

1. Folding knifeB1formal

   A large knife with one or more blades that fold into the handle, typically used for camping or general utility.

   Складной нож

   • He used his jackknife to cut the rope.
   • The scout always carried a jackknife in his pocket.
   • She opened the jackknife to whittle a piece of wood.

   Синонимыclasp knifepenknifepocketknife

2. Diving positionB2formalsport

   A type of dive in which the diver bends at the waist to touch their ankles before straightening out and entering the water.

   Положение при прыжке в воду

   • She performed a perfect jackknife off the high board.
   • The coach taught him how to execute a jackknife dive.
   • His jackknife was the highlight of the diving competition.

• Глагол, означающий резко сгибаться или складываться посередине, как складной нож; обычно используется для транспортных средств (например, грузовик складывается «гармошкой») или акробатических прыжков в воду.

A verb meaning to bend or fold sharply in the middle, like a jackknife; commonly used for vehicles (e.g., a truck jackknifing) or acrobatic dives.

1. Dive in a jackknife positionB2formalsport

   To dive into the water bending the body at the waist to form a right angle, then straightening before entering the water.

   Прыгнуть в воду согнувшись

   • He jackknifed off the high board into the pool.
   • The diver practiced jackknifing from the three-meter platform.
   • She executed a perfect jackknife dive during the competition.

   Синонимыpike

2. Fold or buckle suddenlyB2formal

   To bend or collapse in the middle, typically referring to a vehicle such as a truck or trailer folding sharply.

   Внезапно сложиться

   • The truck jackknifed on the icy highway, blocking all lanes.
   • An accident occurred when the trailer jackknifed during a sudden stop.
   • The driver lost control and the rig jackknifed across the road.

   Синонимыbendbucklecollapsedouble overfold

   Антонимыalignextendstraightenunfold