jackknife
1 of 2noun/ˈdʒæknaɪf/
Forms:jackknives
1
a dive in which the diver bends to touch the ankles before straightening out
2
a large knife with one or more folding blades
Synonyms:
a dive in which the diver bends to touch the ankles before straightening out
a large knife with one or more folding blades