frapper d'un coup de couteau znamená v Angličtina

knife [knifed, knifing, knifes]▼(to use a knife to injure or kill)
verb
[UK: naɪf] [US: ˈnaɪf]

stab [stabbed, stabbing, stabs]▼(to pierce or wound with pointed object)
verb
[UK: stæb] [US: ˈstæb]