LEARNit Dictionary

jackknife

noun
1
a large knife with a blade(= cutting edge) that folds into the handle
چاقوی جیبی, چاقوی تاشو, چاقوی ضامندار
verb
1
to form a V-shape. For example if a lorry that is in two parts jackknifes, the driver loses control and the back part moves towards the front part.
V شکل شدن, شکل وی ایجاد کردن